666512368 has 10 divisors (see below), whose sum is σ = 1291367744. Its totient is φ = 333256176.

The previous prime is 666512347. The next prime is 666512393. The reversal of 666512368 is 863215666.

It is a congruent 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 as a sum of consecutive naturals, namely, 20828496 + ... + 20828527.

Almost surely, 2^666512368 is an apocalyptic number.

It is an amenable number.

666512368 is a deficient number, since it is larger than the sum of its proper divisors (624855376).

666512368 is a wasteful number, since it uses less digits than its factorization.

666512368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41657031 (or 41657025 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 666512368 is about 25816.9008209738. The cubic root of 666512368 is about 873.5130633856.

The spelling of 666512368 in words is "six hundred sixty-six million, five hundred twelve thousand, three hundred sixty-eight".