716965661 has 4 divisors (see below), whose sum is σ = 717024000. Its totient is φ = 716907324.

The previous prime is 716965649. The next prime is 716965663. The reversal of 716965661 is 166569617.

It is a happy number.

716965661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-716965661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716965663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2771 + ... + 37968.

It is an arithmetic number, because the mean of its divisors is an integer number (179256000).

Almost surely, 2^716965661 is an apocalyptic number.

It is an amenable number.

716965661 is a deficient number, since it is larger than the sum of its proper divisors (58339).

716965661 is a wasteful number, since it uses less digits than its factorization.

716965661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58338.

The product of its digits is 408240, while the sum is 47.

The square root of 716965661 is about 26776.2144635869. The cubic root of 716965661 is about 895.0200929709.

The spelling of 716965661 in words is "seven hundred sixteen million, nine hundred sixty-five thousand, six hundred sixty-one".