66037172 has 12 divisors (see below), whose sum is σ = 115910340. Its totient is φ = 32919936.

The previous prime is 66037157. The next prime is 66037177. The reversal of 66037172 is 27173066.

66037172 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5134756 + 60902416 = 2266^2 + 7804^2 .

66037172 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66037177) 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 3 ways as a sum of consecutive naturals, for example, 23147 + ... + 25842.

It is an arithmetic number, because the mean of its divisors is an integer number (9659195).

Almost surely, 2^66037172 is an apocalyptic number.

It is an amenable number.

66037172 is a deficient number, since it is larger than the sum of its proper divisors (49873168).

66037172 is a wasteful number, since it uses less digits than its factorization.

66037172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49330 (or 49328 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 66037172 is about 8126.3258610518. The cubic root of 66037172 is about 404.1998570020.

The spelling of 66037172 in words is "sixty-six million, thirty-seven thousand, one hundred seventy-two".