666118955 has 16 divisors (see below), whose sum is σ = 822769920. Its totient is φ = 517341312.

The previous prime is 666118949. The next prime is 666118969. The reversal of 666118955 is 559811666.

It is a cyclic number.

It is not a de Polignac number, because 666118955 - 2⁸ = 666118699 is a prime.

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, 84857 + ... + 92373.

It is an arithmetic number, because the mean of its divisors is an integer number (51423120).

Almost surely, 2^666118955 is an apocalyptic number.

666118955 is a deficient number, since it is larger than the sum of its proper divisors (156650965).

666118955 is a wasteful number, since it uses less digits than its factorization.

666118955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8038.

The product of its digits is 388800, while the sum is 47.

The square root of 666118955 is about 25809.2804045367. The cubic root of 666118955 is about 873.3411640843.

The spelling of 666118955 in words is "six hundred sixty-six million, one hundred eighteen thousand, nine hundred fifty-five".