71333665 has 8 divisors (see below), whose sum is σ = 92185128. Its totient is φ = 52677120.

The previous prime is 71333651. The next prime is 71333671. The reversal of 71333665 is 56633317.

It can be written as a sum of positive squares in 4 ways, for example, as 4028049 + 67305616 = 2007^2 + 8204^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-71333665 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71333665.

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, 548656 + ... + 548785.

It is an arithmetic number, because the mean of its divisors is an integer number (11523141).

Almost surely, 2^71333665 is an apocalyptic number.

It is an amenable number.

71333665 is a deficient number, since it is larger than the sum of its proper divisors (20851463).

71333665 is a wasteful number, since it uses less digits than its factorization.

71333665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097459.

The product of its digits is 34020, while the sum is 34.

The square root of 71333665 is about 8445.9259409493. The cubic root of 71333665 is about 414.7294215319.

The spelling of 71333665 in words is "seventy-one million, three hundred thirty-three thousand, six hundred sixty-five".