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66666688888888 = 23114118803982687
BaseRepresentation
bin11110010100010000011000…
…10011110100000000111000
322202001021101011200200200101
433022020030103310000320
532214231334323421023
6353442130514045144
720020336461464254
oct1712101423640070
9282037334620611
1066666688888888
111a273202976360
12758854b2797b4
132b2784601058a
141266983753264
157a924846e1ad
hex3ca20c4f4038

66666688888888 has 64 divisors (see below), whose sum is σ = 139697196549120. Its totient is φ = 29562339475200.

The previous prime is 66666688888873. The next prime is 66666688888901. The reversal of 66666688888888 is 88888888666666.

It can be divided in two parts, 66666688 and 888888, that added together give a palindrome (67555576).

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66666688888793 and 66666688888802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67349881 + ... + 68332567.

It is an arithmetic number, because the mean of its divisors is an integer number (2182768696080).

It is a self-describing number.

Almost surely, 266666688888888 is an apocalyptic number.

It is an amenable number.

66666688888888 is an abundant number, since it is smaller than the sum of its proper divisors (73030507660232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66666688888888 is a wasteful number, since it uses less digits than its factorization.

66666688888888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001548 (or 1001544 counting only the distinct ones).

The product of its digits is 782757789696, while the sum is 100.

The spelling of 66666688888888 in words is "sixty-six trillion, six hundred sixty-six billion, six hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-eight".

Divisors: 1 2 4 8 11 22 41 44 82 88 164 328 451 902 1804 3608 18803 37606 75212 150424 206833 413666 770923 827332 982687 1541846 1654664 1965374 3083692 3930748 6167384 7861496 8480153 10809557 16960306 21619114 33920612 40290167 43238228 67841224 80580334 86476456 161160668 322321336 443191837 886383674 1772767348 3545534696 18477463661 36954927322 73909854644 147819709288 203252100271 406504200542 757576010101 813008401084 1515152020202 1626016802168 3030304040404 6060608080808 8333336111111 16666672222222 33333344444444 66666688888888