66732492 has 12 divisors (see below), whose sum is σ = 155709176. Its totient is φ = 22244160.

The previous prime is 66732473. The next prime is 66732493. The reversal of 66732492 is 29423766.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 66732492.

It is not an unprimeable number, because it can be changed into a prime (66732493) 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, 2780509 + ... + 2780532.

Almost surely, 2^66732492 is an apocalyptic number.

It is an amenable number.

66732492 is an abundant number, since it is smaller than the sum of its proper divisors (88976684).

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

66732492 is a wasteful number, since it uses less digits than its factorization.

66732492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5561048 (or 5561046 counting only the distinct ones).

The product of its digits is 108864, while the sum is 39.

The square root of 66732492 is about 8168.9957767158. The cubic root of 66732492 is about 405.6135434635.

The spelling of 66732492 in words is "sixty-six million, seven hundred thirty-two thousand, four hundred ninety-two".