66316172 has 24 divisors (see below), whose sum is σ = 125792016. Its totient is φ = 30408768.

The previous prime is 66316171. The next prime is 66316183. The reversal of 66316172 is 27161366.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (66316171) 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 in 7 ways as a sum of consecutive naturals, for example, 4103 + ... + 12225.

It is an arithmetic number, because the mean of its divisors is an integer number (5241334).

Almost surely, 2^66316172 is an apocalyptic number.

It is an amenable number.

66316172 is a deficient number, since it is larger than the sum of its proper divisors (59475844).

66316172 is a wasteful number, since it uses less digits than its factorization.

66316172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8297 (or 8295 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 66316172 is about 8143.4741971716. The cubic root of 66316172 is about 404.7682909723.

The spelling of 66316172 in words is "sixty-six million, three hundred sixteen thousand, one hundred seventy-two".