71368665 has 24 divisors (see below), whose sum is σ = 118016064. Its totient is φ = 36828000.

The previous prime is 71368657. The next prime is 71368711. The reversal of 71368665 is 56686317.

It is not a de Polignac number, because 71368665 - 2³ = 71368657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11940 + ... + 16890.

It is an arithmetic number, because the mean of its divisors is an integer number (4917336).

Almost surely, 2^71368665 is an apocalyptic number.

It is an amenable number.

71368665 is a deficient number, since it is larger than the sum of its proper divisors (46647399).

71368665 is a wasteful number, since it uses less digits than its factorization.

71368665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5021 (or 4990 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 71368665 is about 8447.9976917610. The cubic root of 71368665 is about 414.7972397043.

It can be divided in two parts, 713 and 68665, that added together give a triangular number (69378 = T₃₇₂).

The spelling of 71368665 in words is "seventy-one million, three hundred sixty-eight thousand, six hundred sixty-five".