666115616670 has 64 divisors (see below), whose sum is σ = 1827159137280. Its totient is φ = 152246734848.

The previous prime is 666115616669. The next prime is 666115616681. The reversal of 666115616670 is 76616511666.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4330846 + ... + 4482014.

It is an arithmetic number, because the mean of its divisors is an integer number (28549361520).

Almost surely, 2^666115616670 is an apocalyptic number.

666115616670 is an abundant number, since it is smaller than the sum of its proper divisors (1161043520610).

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

666115616670 is a wasteful number, since it uses less digits than its factorization.

666115616670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172169.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 666115616670 in words is "six hundred sixty-six billion, one hundred fifteen million, six hundred sixteen thousand, six hundred seventy".