66373712 has 20 divisors (see below), whose sum is σ = 136164276. Its totient is φ = 31234560.

The previous prime is 66373679. The next prime is 66373733. The reversal of 66373712 is 21737366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56911936 + 9461776 = 7544^2 + 3076^2 .

It is a congruent number.

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, 121739 + ... + 122282.

Almost surely, 2^66373712 is an apocalyptic number.

It is an amenable number.

66373712 is an abundant number, since it is smaller than the sum of its proper divisors (69790564).

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

66373712 is a wasteful number, since it uses less digits than its factorization.

66373712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244046 (or 244040 counting only the distinct ones).

The product of its digits is 31752, while the sum is 35.

The square root of 66373712 is about 8147.0063213428. The cubic root of 66373712 is about 404.8853244397.

The spelling of 66373712 in words is "sixty-six million, three hundred seventy-three thousand, seven hundred twelve".