665118057 has 8 divisors (see below), whose sum is σ = 887002720. Its totient is φ = 443322720.

The previous prime is 665118053. The next prime is 665118059. The reversal of 665118057 is 750811566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665118057 - 2² = 665118053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665118053) 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, 2419 + ... + 36552.

It is an arithmetic number, because the mean of its divisors is an integer number (110875340).

Almost surely, 2^665118057 is an apocalyptic number.

It is an amenable number.

665118057 is a deficient number, since it is larger than the sum of its proper divisors (221884663).

665118057 is a wasteful number, since it uses less digits than its factorization.

665118057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44663.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 665118057 is about 25789.8828419208. The cubic root of 665118057 is about 872.9035227298.

The spelling of 665118057 in words is "six hundred sixty-five million, one hundred eighteen thousand, fifty-seven".