664015272 has 32 divisors (see below), whose sum is σ = 1680043680. Its totient is φ = 218671040.

The previous prime is 664015271. The next prime is 664015273. The reversal of 664015272 is 272510466.

It is an interprime number because it is at equal distance from previous prime (664015271) and next prime (664015273).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (664015271) 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, 164679 + ... + 168662.

It is an arithmetic number, because the mean of its divisors is an integer number (52501365).

Almost surely, 2^664015272 is an apocalyptic number.

It is an amenable number.

664015272 is an abundant number, since it is smaller than the sum of its proper divisors (1016028408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664015272 is a wasteful number, since it uses less digits than its factorization.

664015272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333433 (or 333429 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 664015272 is about 25768.4937860171. The cubic root of 664015272 is about 872.4208227481.

It can be divided in two parts, 6640 and 15272, that added together give a palindrome (21912).

The spelling of 664015272 in words is "six hundred sixty-four million, fifteen thousand, two hundred seventy-two".