666752064 has 56 divisors (see below), whose sum is σ = 1924495008. Its totient is φ = 202045440.

The previous prime is 666752057. The next prime is 666752071. The reversal of 666752064 is 460257666.

666752064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (666752057) and next prime (666752071).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155737 + ... + 159960.

Almost surely, 2^666752064 is an apocalyptic number.

666752064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

666752064 is an abundant number, since it is smaller than the sum of its proper divisors (1257742944).

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

666752064 is a wasteful number, since it uses less digits than its factorization.

666752064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315723 (or 315713 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The square root of 666752064 is about 25821.5426340101. The cubic root of 666752064 is about 873.6177638648.

The spelling of 666752064 in words is "six hundred sixty-six million, seven hundred fifty-two thousand, sixty-four".