66747136 has 36 divisors (see below), whose sum is σ = 134348032. Its totient is φ = 33094656.

The previous prime is 66747103. The next prime is 66747181. The reversal of 66747136 is 63174766.

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, 31486 + ... + 33538.

Almost surely, 2^66747136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66747136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67174016).

66747136 is an abundant number, since it is smaller than the sum of its proper divisors (67600896).

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

66747136 is a wasteful number, since it uses less digits than its factorization.

66747136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196 (or 2182 counting only the distinct ones).

The product of its digits is 127008, while the sum is 40.

The square root of 66747136 is about 8169.8920433504. The cubic root of 66747136 is about 405.6432110219.

The spelling of 66747136 in words is "sixty-six million, seven hundred forty-seven thousand, one hundred thirty-six".