656165166066 has 64 divisors (see below), whose sum is σ = 1461636864000. Its totient is φ = 218198464848.

The previous prime is 656165166011. The next prime is 656165166101. The reversal of 656165166066 is 660661561656.

656165166066 is a `hidden beast` number, since 6 + 5 + 6 + 1 + 6 + 516 + 60 + 66 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49903305 + ... + 49916451.

It is an arithmetic number, because the mean of its divisors is an integer number (22838076000).

Almost surely, 2^656165166066 is an apocalyptic number.

656165166066 is an abundant number, since it is smaller than the sum of its proper divisors (805471697934).

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

656165166066 is a wasteful number, since it uses less digits than its factorization.

656165166066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15300 (or 15294 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 656165166066 in words is "six hundred fifty-six billion, one hundred sixty-five million, one hundred sixty-six thousand, sixty-six".