71668336 has 20 divisors (see below), whose sum is σ = 138988872. Its totient is φ = 35800256.

The previous prime is 71668307. The next prime is 71668343. The reversal of 71668336 is 63386617.

It is a congruent 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, 30831 + ... + 33073.

Almost surely, 2^71668336 is an apocalyptic number.

It is an amenable number.

71668336 is a deficient number, since it is larger than the sum of its proper divisors (67320536).

71668336 is a wasteful number, since it uses less digits than its factorization.

71668336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248 (or 4242 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 71668336 is about 8465.7153271298. The cubic root of 71668336 is about 415.3769952104.

The spelling of 71668336 in words is "seventy-one million, six hundred sixty-eight thousand, three hundred thirty-six".