66532664 has 16 divisors (see below), whose sum is σ = 136089720. Its totient is φ = 30242080.

The previous prime is 66532607. The next prime is 66532681. The reversal of 66532664 is 46623566.

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, 377939 + ... + 378114.

Almost surely, 2^66532664 is an apocalyptic number.

It is an amenable number.

66532664 is an abundant number, since it is smaller than the sum of its proper divisors (69557056).

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

66532664 is a wasteful number, since it uses less digits than its factorization.

66532664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756070 (or 756066 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 66532664 is about 8156.7557276162. The cubic root of 66532664 is about 405.2082737119.

The spelling of 66532664 in words is "sixty-six million, five hundred thirty-two thousand, six hundred sixty-four".