71717668 has 36 divisors (see below), whose sum is σ = 139962816. Its totient is φ = 32124400.

The previous prime is 71717641. The next prime is 71717677. The reversal of 71717668 is 86671717.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33321 + ... + 35407.

It is an arithmetic number, because the mean of its divisors is an integer number (3887856).

Almost surely, 2^71717668 is an apocalyptic number.

It is an amenable number.

71717668 is a deficient number, since it is larger than the sum of its proper divisors (68245148).

71717668 is a wasteful number, since it uses less digits than its factorization.

71717668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184 (or 2171 counting only the distinct ones).

The product of its digits is 98784, while the sum is 43.

The square root of 71717668 is about 8468.6284603825. The cubic root of 71717668 is about 415.4722798656.

The spelling of 71717668 in words is "seventy-one million, seven hundred seventeen thousand, six hundred sixty-eight".