66772072 has 32 divisors (see below), whose sum is σ = 127526400. Its totient is φ = 32771200.

The previous prime is 66772051. The next prime is 66772093. The reversal of 66772072 is 27027766.

It is an interprime number because it is at equal distance from previous prime (66772051) and next prime (66772093).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135747 + ... + 136237.

It is an arithmetic number, because the mean of its divisors is an integer number (3985200).

Almost surely, 2^66772072 is an apocalyptic number.

It is an amenable number.

66772072 is a deficient number, since it is larger than the sum of its proper divisors (60754328).

66772072 is a wasteful number, since it uses less digits than its factorization.

66772072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 66772072 is about 8171.4179920011. The cubic root of 66772072 is about 405.6937193550.

The spelling of 66772072 in words is "sixty-six million, seven hundred seventy-two thousand, seventy-two".