666305996 has 12 divisors (see below), whose sum is σ = 1168110552. Its totient is φ = 332560128.

The previous prime is 666305963. The next prime is 666306023. The reversal of 666305996 is 699503666.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145685 + ... + 150188.

It is an arithmetic number, because the mean of its divisors is an integer number (97342546).

Almost surely, 2^666305996 is an apocalyptic number.

It is an amenable number.

666305996 is a deficient number, since it is larger than the sum of its proper divisors (501804556).

666305996 is a wasteful number, since it uses less digits than its factorization.

666305996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296440 (or 296438 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 50.

The square root of 666305996 is about 25812.9036723884. The cubic root of 666305996 is about 873.4228988939.

The spelling of 666305996 in words is "six hundred sixty-six million, three hundred five thousand, nine hundred ninety-six".