Search a number
-
+
666042366621 = 3222014122207
BaseRepresentation
bin10011011000100110011…
…01111111101010011101
32100200011122012212222210
421230103031333222131
541403023321212441
61225550423231033
766056102463642
oct11542315775235
92320148185883
10666042366621
11237515609085
12a91002a8479
134aa66198258
1424345413dc9
15124d2cc6616
hex9b1337fa9d

666042366621 has 4 divisors (see below), whose sum is σ = 888056488832. Its totient is φ = 444028244412.

The previous prime is 666042366599. The next prime is 666042366637. The reversal of 666042366621 is 126663240666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 666042366621 - 218 = 666042104477 is a prime.

It is a super-2 number, since 2×6660423666212 (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666042362621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111007061101 + ... + 111007061106.

It is an arithmetic number, because the mean of its divisors is an integer number (222014122208).

Almost surely, 2666042366621 is an apocalyptic number.

It is an amenable number.

666042366621 is a deficient number, since it is larger than the sum of its proper divisors (222014122211).

666042366621 is a wasteful number, since it uses less digits than its factorization.

666042366621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222014122210.

The product of its (nonzero) digits is 2239488, while the sum is 48.

The spelling of 666042366621 in words is "six hundred sixty-six billion, forty-two million, three hundred sixty-six thousand, six hundred twenty-one".

Divisors: 1 3 222014122207 666042366621