66695612 has 12 divisors (see below), whose sum is σ = 117173280. Its totient is φ = 33217536.

The previous prime is 66695609. The next prime is 66695617. The reversal of 66695612 is 21659666.

It is a self number, because there is not a number n which added to its sum of digits gives 66695612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66695617) 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, 31412 + ... + 33467.

It is an arithmetic number, because the mean of its divisors is an integer number (9764440).

Almost surely, 2^66695612 is an apocalyptic number.

It is an amenable number.

66695612 is a deficient number, since it is larger than the sum of its proper divisors (50477668).

66695612 is a wasteful number, since it uses less digits than its factorization.

66695612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65140 (or 65138 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 66695612 is about 8166.7381493470. The cubic root of 66695612 is about 405.5388083352.

The spelling of 66695612 in words is "sixty-six million, six hundred ninety-five thousand, six hundred twelve".