666656111652 has 48 divisors (see below), whose sum is σ = 1561558824000. Its totient is φ = 221357837440.

The previous prime is 666656111617. The next prime is 666656111677. The reversal of 666656111652 is 256111656666.

It is a junction number, because it is equal to n+sod(n) for n = 666656111595 and 666656111604.

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, 28068502 + ... + 28092242.

It is an arithmetic number, because the mean of its divisors is an integer number (32532475500).

Almost surely, 2^666656111652 is an apocalyptic number.

It is an amenable number.

666656111652 is an abundant number, since it is smaller than the sum of its proper divisors (894902712348).

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

666656111652 is a wasteful number, since it uses less digits than its factorization.

666656111652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32716 (or 32714 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 51.

The spelling of 666656111652 in words is "six hundred sixty-six billion, six hundred fifty-six million, one hundred eleven thousand, six hundred fifty-two".