66695672 has 16 divisors (see below), whose sum is σ = 125712000. Its totient is φ = 33172480.

The previous prime is 66695659. The next prime is 66695687. The reversal of 66695672 is 27659666.

It is a congruent number.

It is an unprimeable number.

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, 20297 + ... + 23352.

It is an arithmetic number, because the mean of its divisors is an integer number (7857000).

Almost surely, 2^66695672 is an apocalyptic number.

It is an amenable number.

66695672 is a deficient number, since it is larger than the sum of its proper divisors (59016328).

66695672 is a wasteful number, since it uses less digits than its factorization.

66695672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43846 (or 43842 counting only the distinct ones).

The product of its digits is 816480, while the sum is 47.

The square root of 66695672 is about 8166.7418227834. The cubic root of 66695672 is about 405.5389299440.

The spelling of 66695672 in words is "sixty-six million, six hundred ninety-five thousand, six hundred seventy-two".