71660633 has 16 divisors (see below), whose sum is σ = 80308800. Its totient is φ = 63391680.

The previous prime is 71660629. The next prime is 71660651. The reversal of 71660633 is 33606617.

It is a happy number.

It is not a de Polignac number, because 71660633 - 2² = 71660629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71660633.

It is not an unprimeable number, because it can be changed into a prime (71663633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70235 + ... + 71247.

It is an arithmetic number, because the mean of its divisors is an integer number (5019300).

Almost surely, 2^71660633 is an apocalyptic number.

It is an amenable number.

71660633 is a deficient number, since it is larger than the sum of its proper divisors (8648167).

71660633 is a wasteful number, since it uses less digits than its factorization.

71660633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 71660633 is about 8465.2603622098. The cubic root of 71660633 is about 415.3621129355.

The spelling of 71660633 in words is "seventy-one million, six hundred sixty thousand, six hundred thirty-three".