666508113 has 24 divisors (see below), whose sum is σ = 970756800. Its totient is φ = 440652960.

The previous prime is 666508097. The next prime is 666508123. The reversal of 666508113 is 311805666.

It is a happy number.

It is not a de Polignac number, because 666508113 - 2⁴ = 666508097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (666508123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1008003 + ... + 1008663.

It is an arithmetic number, because the mean of its divisors is an integer number (40448200).

Almost surely, 2^666508113 is an apocalyptic number.

It is an amenable number.

666508113 is a deficient number, since it is larger than the sum of its proper divisors (304248687).

666508113 is a wasteful number, since it uses less digits than its factorization.

666508113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429 (or 1426 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 666508113 is about 25816.8184135846. The cubic root of 666508113 is about 873.5112045524.

The spelling of 666508113 in words is "six hundred sixty-six million, five hundred eight thousand, one hundred thirteen".