71668604 has 12 divisors (see below), whose sum is σ = 143337264. Its totient is φ = 30715104.

The previous prime is 71668603. The next prime is 71668613. The reversal of 71668604 is 40686617.

71668604 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71668601) 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 in 3 ways as a sum of consecutive naturals, for example, 1279769 + ... + 1279824.

It is an arithmetic number, because the mean of its divisors is an integer number (11944772).

Almost surely, 2^71668604 is an apocalyptic number.

It is an amenable number.

71668604 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71668604 is a wasteful number, since it uses less digits than its factorization.

71668604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559604 (or 2559602 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 71668604 is about 8465.7311556652. The cubic root of 71668604 is about 415.3775129699.

The spelling of 71668604 in words is "seventy-one million, six hundred sixty-eight thousand, six hundred four".