66360872 has 8 divisors (see below), whose sum is σ = 124426650. Its totient is φ = 33180432.

The previous prime is 66360871. The next prime is 66360881. The reversal of 66360872 is 27806366.

66360872 is digitally balanced in base 2, 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 only one way, i.e., 66161956 + 198916 = 8134^2 + 446^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66360871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4147547 + ... + 4147562.

Almost surely, 2^66360872 is an apocalyptic number.

It is an amenable number.

66360872 is a deficient number, since it is larger than the sum of its proper divisors (58065778).

66360872 is a wasteful number, since it uses less digits than its factorization.

66360872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8295115 (or 8295111 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 66360872 is about 8146.2182637099. The cubic root of 66360872 is about 404.8592143896.

The spelling of 66360872 in words is "sixty-six million, three hundred sixty thousand, eight hundred seventy-two".