666997124 has 24 divisors (see below), whose sum is σ = 1191523200. Its totient is φ = 326604960.

The previous prime is 666997087. The next prime is 666997151. The reversal of 666997124 is 421799666.

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, 58742 + ... + 69170.

It is an arithmetic number, because the mean of its divisors is an integer number (49646800).

Almost surely, 2^666997124 is an apocalyptic number.

It is an amenable number.

666997124 is a deficient number, since it is larger than the sum of its proper divisors (524526076).

666997124 is a wasteful number, since it uses less digits than its factorization.

666997124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10763 (or 10761 counting only the distinct ones).

The product of its digits is 979776, while the sum is 50.

The square root of 666997124 is about 25826.2874606475. The cubic root of 666997124 is about 873.7247814291.

The spelling of 666997124 in words is "six hundred sixty-six million, nine hundred ninety-seven thousand, one hundred twenty-four".