71522664 has 32 divisors (see below), whose sum is σ = 179340000. Its totient is φ = 23769792.

The previous prime is 71522657. The next prime is 71522681. The reversal of 71522664 is 46622517.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4107 + ... + 12645.

It is an arithmetic number, because the mean of its divisors is an integer number (5604375).

Almost surely, 2^71522664 is an apocalyptic number.

It is an amenable number.

71522664 is an abundant number, since it is smaller than the sum of its proper divisors (107817336).

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

71522664 is a wasteful number, since it uses less digits than its factorization.

71522664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8897 (or 8893 counting only the distinct ones).

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

The square root of 71522664 is about 8457.1073068751. The cubic root of 71522664 is about 415.0953746054.

The spelling of 71522664 in words is "seventy-one million, five hundred twenty-two thousand, six hundred sixty-four".