666155116 has 24 divisors (see below), whose sum is σ = 1273358016. Its totient is φ = 302415120.

The previous prime is 666155107. The next prime is 666155159. The reversal of 666155116 is 611551666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27235 + ... + 45541.

It is an arithmetic number, because the mean of its divisors is an integer number (53056584).

Almost surely, 2^666155116 is an apocalyptic number.

It is an amenable number.

666155116 is a deficient number, since it is larger than the sum of its proper divisors (607202900).

666155116 is a wasteful number, since it uses less digits than its factorization.

666155116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19149 (or 19147 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 666155116 is about 25809.9809376140. The cubic root of 666155116 is about 873.3569672268.

The spelling of 666155116 in words is "six hundred sixty-six million, one hundred fifty-five thousand, one hundred sixteen".