66732912 has 120 divisors (see below), whose sum is σ = 194987520. Its totient is φ = 21288960.

The previous prime is 66732907. The next prime is 66732929. The reversal of 66732912 is 21923766.

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 23 ways as a sum of consecutive naturals, for example, 525393 + ... + 525519.

It is an arithmetic number, because the mean of its divisors is an integer number (1624896).

Almost surely, 2^66732912 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 66732912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97493760).

66732912 is an abundant number, since it is smaller than the sum of its proper divisors (128254608).

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

66732912 is a wasteful number, since it uses less digits than its factorization.

66732912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 262 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 66732912 is about 8169.0214836295. The cubic root of 66732912 is about 405.6143944100.

The spelling of 66732912 in words is "sixty-six million, seven hundred thirty-two thousand, nine hundred twelve".