66694100 has 36 divisors (see below), whose sum is σ = 157885728. Its totient is φ = 24252000.

The previous prime is 66694079. The next prime is 66694109. The reversal of 66694100 is 149666.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66694109) 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 11 ways as a sum of consecutive naturals, for example, 29216 + ... + 31415.

Almost surely, 2^66694100 is an apocalyptic number.

It is an amenable number.

66694100 is an abundant number, since it is smaller than the sum of its proper divisors (91191628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66694100 is a wasteful number, since it uses less digits than its factorization.

66694100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60656 (or 60649 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 66694100 is about 8166.6455782041. The cubic root of 66694100 is about 405.5357437692.

The spelling of 66694100 in words is "sixty-six million, six hundred ninety-four thousand, one hundred".