66578012 has 12 divisors (see below), whose sum is σ = 117186216. Its totient is φ = 33096240.

The previous prime is 66578009. The next prime is 66578021. The reversal of 66578012 is 21087566.

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, 47414 + ... + 48797.

It is an arithmetic number, because the mean of its divisors is an integer number (9765518).

Almost surely, 2^66578012 is an apocalyptic number.

It is an amenable number.

66578012 is a deficient number, since it is larger than the sum of its proper divisors (50608204).

66578012 is a wasteful number, since it uses less digits than its factorization.

66578012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96388 (or 96386 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 66578012 is about 8159.5350357726. The cubic root of 66578012 is about 405.3003147758.

The spelling of 66578012 in words is "sixty-six million, five hundred seventy-eight thousand, twelve".