666117757052 has 24 divisors (see below), whose sum is σ = 1271700667440. Its totient is φ = 302775724160.

The previous prime is 666117757027. The next prime is 666117757057. The reversal of 666117757052 is 250757711666.

It is a junction number, because it is equal to n+sod(n) for n = 666117756985 and 666117757003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666117757057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4143224 + ... + 4300992.

It is an arithmetic number, because the mean of its divisors is an integer number (52987527810).

Almost surely, 2^666117757052 is an apocalyptic number.

It is an amenable number.

666117757052 is a deficient number, since it is larger than the sum of its proper divisors (605582910388).

666117757052 is a wasteful number, since it uses less digits than its factorization.

666117757052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253741 (or 253739 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 53.

The spelling of 666117757052 in words is "six hundred sixty-six billion, one hundred seventeen million, seven hundred fifty-seven thousand, fifty-two".