66707264 has 28 divisors (see below), whose sum is σ = 142556484. Its totient is φ = 30787584.

The previous prime is 66707227. The next prime is 66707281. The reversal of 66707264 is 46270766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17707264 + 49000000 = 4208^2 + 7000^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39257 + ... + 40920.

It is an arithmetic number, because the mean of its divisors is an integer number (5091303).

Almost surely, 2^66707264 is an apocalyptic number.

66707264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66707264 is an abundant number, since it is smaller than the sum of its proper divisors (75849220).

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

66707264 is a wasteful number, since it uses less digits than its factorization.

66707264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80202 (or 80192 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 66707264 is about 8167.4514997030. The cubic root of 66707264 is about 405.5624233972.

The spelling of 66707264 in words is "sixty-six million, seven hundred seven thousand, two hundred sixty-four".