71664760 has 32 divisors (see below), whose sum is σ = 162098640. Its totient is φ = 28514304.

The previous prime is 71664737. The next prime is 71664779. The reversal of 71664760 is 6746617.

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, 3079 + ... + 12361.

Almost surely, 2^71664760 is an apocalyptic number.

It is an amenable number.

71664760 is an abundant number, since it is smaller than the sum of its proper divisors (90433880).

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

71664760 is a wasteful number, since it uses less digits than its factorization.

71664760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9487 (or 9483 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 71664760 is about 8465.5041196612. The cubic root of 71664760 is about 415.3700864743.

The spelling of 71664760 in words is "seventy-one million, six hundred sixty-four thousand, seven hundred sixty".