664748387163 has 48 divisors (see below), whose sum is σ = 1112116002816. Its totient is φ = 374782282560.

The previous prime is 664748387119. The next prime is 664748387189. The reversal of 664748387163 is 361783847466.

664748387163 is a `hidden beast` number, since 6 + 6 + 474 + 8 + 38 + 71 + 63 = 666.

It is not a de Polignac number, because 664748387163 - 2¹² = 664748383067 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 664748387163.

It is not an unprimeable number, because it can be changed into a prime (664748387113) 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, 1218670 + ... + 1677692.

It is an arithmetic number, because the mean of its divisors is an integer number (23169083392).

Almost surely, 2^664748387163 is an apocalyptic number.

664748387163 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

664748387163 is a deficient number, since it is larger than the sum of its proper divisors (447367615653).

664748387163 is a wasteful number, since it uses less digits than its factorization.

664748387163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459344 (or 459341 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 63.

The spelling of 664748387163 in words is "six hundred sixty-four billion, seven hundred forty-eight million, three hundred eighty-seven thousand, one hundred sixty-three".