66332544 has 32 divisors (see below), whose sum is σ = 176196840. Its totient is φ = 22110720.

The previous prime is 66332543. The next prime is 66332549. The reversal of 66332544 is 44523366.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66332543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85987 + ... + 86754.

Almost surely, 2^66332544 is an apocalyptic number.

66332544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66332544 is an abundant number, since it is smaller than the sum of its proper divisors (109864296).

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

66332544 is a wasteful number, since it uses less digits than its factorization.

66332544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172758 (or 172746 counting only the distinct ones).

The product of its digits is 51840, while the sum is 33.

The square root of 66332544 is about 8144.4793572088. The cubic root of 66332544 is about 404.8015976857.

The spelling of 66332544 in words is "sixty-six million, three hundred thirty-two thousand, five hundred forty-four".