666756032 has 14 divisors (see below), whose sum is σ = 1323094128. Its totient is φ = 333377984.

The previous prime is 666756019. The next prime is 666756073. The reversal of 666756032 is 230657666.

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, 5208968 + ... + 5209095.

Almost surely, 2^666756032 is an apocalyptic number.

It is an amenable number.

666756032 is a deficient number, since it is larger than the sum of its proper divisors (656338096).

666756032 is a wasteful number, since it uses less digits than its factorization.

666756032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10418075 (or 10418065 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 666756032 is about 25821.6194689644. The cubic root of 666756032 is about 873.6194968970.

The spelling of 666756032 in words is "six hundred sixty-six million, seven hundred fifty-six thousand, thirty-two".