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