664464523740507 has 48 divisors (see below), whose sum is σ = 1124268586721280. Its totient is φ = 370319478068736.

The previous prime is 664464523740431. The next prime is 664464523740533. The reversal of 664464523740507 is 705047325464466.

664464523740507 is a `hidden beast` number, since 6 + 6 + 4 + 4 + 6 + 4 + 52 + 3 + 74 + 0 + 507 = 666.

It is not a de Polignac number, because 664464523740507 - 2¹⁴ = 664464523724123 is a prime.

It is a super-2 number, since 2×664464523740507² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (664464523740587) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 703321878 + ... + 704265995.

It is an arithmetic number, because the mean of its divisors is an integer number (23422262223360).

Almost surely, 2^{664464523740507} is an apocalyptic number.

664464523740507 is a deficient number, since it is larger than the sum of its proper divisors (459804062980773).

664464523740507 is a wasteful number, since it uses less digits than its factorization.

664464523740507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407588072 (or 1407588069 counting only the distinct ones).

The product of its (nonzero) digits is 406425600, while the sum is 63.

The spelling of 664464523740507 in words is "six hundred sixty-four trillion, four hundred sixty-four billion, five hundred twenty-three million, seven hundred forty thousand, five hundred seven".