66732516 has 36 divisors (see below), whose sum is σ = 169092924. Its totient is φ = 22190400.

The previous prime is 66732493. The next prime is 66732521. The reversal of 66732516 is 61523766.

It can be written as a sum of positive squares in 2 ways, for example, as 11289600 + 55442916 = 3360^2 + 7446^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

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, 14586 + ... + 18606.

Almost surely, 2^66732516 is an apocalyptic number.

It is an amenable number.

66732516 is an abundant number, since it is smaller than the sum of its proper divisors (102360408).

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

66732516 is a wasteful number, since it uses less digits than its factorization.

66732516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492 (or 4487 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 66732516 is about 8168.9972456844. The cubic root of 66732516 is about 405.6135920891.

The spelling of 66732516 in words is "sixty-six million, seven hundred thirty-two thousand, five hundred sixteen".