66506264 has 32 divisors (see below), whose sum is σ = 139361040. Its totient is φ = 29491200.

The previous prime is 66506243. The next prime is 66506267. The reversal of 66506264 is 46260566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66506267) 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, 5609 + ... + 12824.

Almost surely, 2^66506264 is an apocalyptic number.

It is an amenable number.

66506264 is an abundant number, since it is smaller than the sum of its proper divisors (72854776).

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

66506264 is a wasteful number, since it uses less digits than its factorization.

66506264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18491 (or 18487 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 66506264 is about 8155.1372765883. The cubic root of 66506264 is about 405.1546714008.

The spelling of 66506264 in words is "sixty-six million, five hundred six thousand, two hundred sixty-four".