664426264863 has 8 divisors (see below), whose sum is σ = 885914195328. Its totient is φ = 442944588824.

The previous prime is 664426264849. The next prime is 664426264867. The reversal of 664426264863 is 368462624466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664426264863 - 2²⁸ = 664157829407 is a prime.

It is a super-2 number, since 2×664426264863² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664426264867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1309845 + ... + 1744862.

It is an arithmetic number, because the mean of its divisors is an integer number (110739274416).

Almost surely, 2^664426264863 is an apocalyptic number.

664426264863 is a deficient number, since it is larger than the sum of its proper divisors (221487930465).

664426264863 is a wasteful number, since it uses less digits than its factorization.

664426264863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3127213.

The product of its digits is 47775744, while the sum is 57.

The spelling of 664426264863 in words is "six hundred sixty-four billion, four hundred twenty-six million, two hundred sixty-four thousand, eight hundred sixty-three".