664710364731 has 16 divisors (see below), whose sum is σ = 1012915116800. Its totient is φ = 379825819488.

The previous prime is 664710364729. The next prime is 664710364751. The reversal of 664710364731 is 137463017466.

It is not a de Polignac number, because 664710364731 - 2¹ = 664710364729 is a prime.

It is a super-2 number, since 2×664710364731² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664710364751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 645165 + ... + 1321233.

It is an arithmetic number, because the mean of its divisors is an integer number (63307194800).

Almost surely, 2^664710364731 is an apocalyptic number.

664710364731 is a deficient number, since it is larger than the sum of its proper divisors (348204752069).

664710364731 is a wasteful number, since it uses less digits than its factorization.

664710364731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722898.

The product of its (nonzero) digits is 1524096, while the sum is 48.

The spelling of 664710364731 in words is "six hundred sixty-four billion, seven hundred ten million, three hundred sixty-four thousand, seven hundred thirty-one".