66972952 has 8 divisors (see below), whose sum is σ = 125574300. Its totient is φ = 33486472.

The previous prime is 66972889. The next prime is 66972959. The reversal of 66972952 is 25927966.

It is a tau number, because it is divible by the number of its divisors (8).

It is a pancake number, because a pancake can be divided into 66972952 parts by 11573 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66972959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4185802 + ... + 4185817.

Almost surely, 2^66972952 is an apocalyptic number.

It is an amenable number.

66972952 is a deficient number, since it is larger than the sum of its proper divisors (58601348).

66972952 is a wasteful number, since it uses less digits than its factorization.

66972952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8371625 (or 8371621 counting only the distinct ones).

The product of its digits is 408240, while the sum is 46.

The square root of 66972952 is about 8183.7003855224. The cubic root of 66972952 is about 406.1001475871.

The spelling of 66972952 in words is "sixty-six million, nine hundred seventy-two thousand, nine hundred fifty-two".