66817264 has 40 divisors (see below), whose sum is σ = 135281520. Its totient is φ = 31938048.

The previous prime is 66817253. The next prime is 66817273. The reversal of 66817264 is 46271866.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33972 + ... + 35884.

It is an arithmetic number, because the mean of its divisors is an integer number (3382038).

Almost surely, 2^66817264 is an apocalyptic number.

It is an amenable number.

66817264 is an abundant number, since it is smaller than the sum of its proper divisors (68464256).

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

66817264 is a wasteful number, since it uses less digits than its factorization.

66817264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017 (or 2011 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 66817264 is about 8174.1827726079. The cubic root of 66817264 is about 405.7852245573.

It can be divided in two parts, 66817 and 264, that added together give a square (67081 = 259²).

The spelling of 66817264 in words is "sixty-six million, eight hundred seventeen thousand, two hundred sixty-four".