66516264 has 48 divisors (see below), whose sum is σ = 189633600. Its totient is φ = 21004704.

The previous prime is 66516239. The next prime is 66516271. The reversal of 66516264 is 46261566.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22944 + ... + 25679.

It is an arithmetic number, because the mean of its divisors is an integer number (3950700).

Almost surely, 2^66516264 is an apocalyptic number.

It is an amenable number.

66516264 is an abundant number, since it is smaller than the sum of its proper divisors (123117336).

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

66516264 is a wasteful number, since it uses less digits than its factorization.

66516264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48654 (or 48647 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 66516264 is about 8155.7503640070. The cubic root of 66516264 is about 405.1749769752.

The spelling of 66516264 in words is "sixty-six million, five hundred sixteen thousand, two hundred sixty-four".