666489392 has 10 divisors (see below), whose sum is σ = 1291323228. Its totient is φ = 333244688.

The previous prime is 666489371. The next prime is 666489427. The reversal of 666489392 is 293984666.

666489392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20827778 + ... + 20827809.

Almost surely, 2^666489392 is an apocalyptic number.

It is an amenable number.

666489392 is a deficient number, since it is larger than the sum of its proper divisors (624833836).

666489392 is a wasteful number, since it uses less digits than its factorization.

666489392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41655595 (or 41655589 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 53.

The square root of 666489392 is about 25816.4558373143. The cubic root of 666489392 is about 873.5030260291.

The spelling of 666489392 in words is "six hundred sixty-six million, four hundred eighty-nine thousand, three hundred ninety-two".