66744972 has 60 divisors (see below), whose sum is σ = 199417680. Its totient is φ = 19069344.

The previous prime is 66744961. The next prime is 66744973. The reversal of 66744972 is 27944766.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (66744973) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12447 + ... + 16982.

It is an arithmetic number, because the mean of its divisors is an integer number (3323628).

Almost surely, 2^66744972 is an apocalyptic number.

It is an amenable number.

66744972 is an abundant number, since it is smaller than the sum of its proper divisors (132672708).

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

66744972 is a wasteful number, since it uses less digits than its factorization.

66744972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29452 (or 29441 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 66744972 is about 8169.7596047864. The cubic root of 66744972 is about 405.6388272063.

The spelling of 66744972 in words is "sixty-six million, seven hundred forty-four thousand, nine hundred seventy-two".