666490692 has 24 divisors (see below), whose sum is σ = 1777308736. Its totient is φ = 190425888.

The previous prime is 666490681. The next prime is 666490709. The reversal of 666490692 is 296094666.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3967123 + ... + 3967290.

Almost surely, 2^666490692 is an apocalyptic number.

It is an amenable number.

666490692 is an abundant number, since it is smaller than the sum of its proper divisors (1110818044).

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

666490692 is a wasteful number, since it uses less digits than its factorization.

666490692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7934427 (or 7934425 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 48.

The square root of 666490692 is about 25816.4810150415. The cubic root of 666490692 is about 873.5035939567.

The spelling of 666490692 in words is "six hundred sixty-six million, four hundred ninety thousand, six hundred ninety-two".