66747504 has 20 divisors (see below), whose sum is σ = 172431176. Its totient is φ = 22249152.

The previous prime is 66747503. The next prime is 66747533. The reversal of 66747504 is 40574766.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66747503) 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, 695239 + ... + 695334.

Almost surely, 2^66747504 is an apocalyptic number.

It is an amenable number.

66747504 is an abundant number, since it is smaller than the sum of its proper divisors (105683672).

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

66747504 is a wasteful number, since it uses less digits than its factorization.

66747504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390584 (or 1390578 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 39.

The square root of 66747504 is about 8169.9145650368. The cubic root of 66747504 is about 405.6439565042.

The spelling of 66747504 in words is "sixty-six million, seven hundred forty-seven thousand, five hundred four".