664457300750666 has 16 divisors (see below), whose sum is σ = 1049168318429760. Its totient is φ = 314735368340160.

The previous prime is 664457300750623. The next prime is 664457300750713. The reversal of 664457300750666 is 666057003754466.

It is a super-2 number, since 2×664457300750666² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208497590 + ... + 211660481.

It is an arithmetic number, because the mean of its divisors is an integer number (65573019901860).

Almost surely, 2^{664457300750666} is an apocalyptic number.

664457300750666 is a deficient number, since it is larger than the sum of its proper divisors (384711017679094).

664457300750666 is a wasteful number, since it uses less digits than its factorization.

664457300750666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420199709.

The product of its (nonzero) digits is 457228800, while the sum is 65.

The spelling of 664457300750666 in words is "six hundred sixty-four trillion, four hundred fifty-seven billion, three hundred million, seven hundred fifty thousand, six hundred sixty-six".