71664208 has 40 divisors (see below), whose sum is σ = 173113920. Its totient is φ = 27920640.

The previous prime is 71664199. The next prime is 71664211. The reversal of 71664208 is 80246617.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27853 + ... + 30316.

It is an arithmetic number, because the mean of its divisors is an integer number (4327848).

Almost surely, 2^71664208 is an apocalyptic number.

It is an amenable number.

71664208 is an abundant number, since it is smaller than the sum of its proper divisors (101449712).

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

71664208 is a wasteful number, since it uses less digits than its factorization.

71664208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58195 (or 58189 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 71664208 is about 8465.4715166965. The cubic root of 71664208 is about 415.3690200047.

The spelling of 71664208 in words is "seventy-one million, six hundred sixty-four thousand, two hundred eight".