716668689 has 32 divisors (see below), whose sum is σ = 1058682240. Its totient is φ = 427622400.

The previous prime is 716668681. The next prime is 716668699. The reversal of 716668689 is 986866617.

It is not a de Polignac number, because 716668689 - 2³ = 716668681 is a prime.

It is a super-2 number, since 2×716668689² = 1027228019585957442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (716668681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 770977 + ... + 771905.

It is an arithmetic number, because the mean of its divisors is an integer number (33083820).

Almost surely, 2^716668689 is an apocalyptic number.

It is an amenable number.

716668689 is a deficient number, since it is larger than the sum of its proper divisors (342013551).

716668689 is a wasteful number, since it uses less digits than its factorization.

716668689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281.

The product of its digits is 5225472, while the sum is 57.

The square root of 716668689 is about 26770.6684451472. The cubic root of 716668689 is about 894.8965014573.

It can be divided in two parts, 7166 and 68689, that added together give a triangular number (75855 = T₃₈₉).

The spelling of 716668689 in words is "seven hundred sixteen million, six hundred sixty-eight thousand, six hundred eighty-nine".