71699660 has 12 divisors (see below), whose sum is σ = 150569328. Its totient is φ = 28679856.

The previous prime is 71699657. The next prime is 71699713. The reversal of 71699660 is 6699617.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792472 + ... + 1792511.

It is an arithmetic number, because the mean of its divisors is an integer number (12547444).

Almost surely, 2^71699660 is an apocalyptic number.

It is an amenable number.

71699660 is an abundant number, since it is smaller than the sum of its proper divisors (78869668).

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

71699660 is a wasteful number, since it uses less digits than its factorization.

71699660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584992 (or 3584990 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 71699660 is about 8467.5651754209. The cubic root of 71699660 is about 415.4375025165.

The spelling of 71699660 in words is "seventy-one million, six hundred ninety-nine thousand, six hundred sixty".