716387661 has 24 divisors (see below), whose sum is σ = 1130946336. Its totient is φ = 433369440.

The previous prime is 716387641. The next prime is 716387671. The reversal of 716387661 is 166783617.

716387661 is a `hidden beast` number, since 7 + 1 + 638 + 7 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 716387661 - 2⁶ = 716387597 is a prime.

It is a super-2 number, since 2×716387661² = 1026422561666101842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716387641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49311 + ... + 62163.

It is an arithmetic number, because the mean of its divisors is an integer number (47122764).

Almost surely, 2^716387661 is an apocalyptic number.

It is an amenable number.

716387661 is a deficient number, since it is larger than the sum of its proper divisors (414558675).

716387661 is a wasteful number, since it uses less digits than its factorization.

716387661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13433 (or 13430 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 716387661 is about 26765.4191261785. The cubic root of 716387661 is about 894.7795139485.

The spelling of 716387661 in words is "seven hundred sixteen million, three hundred eighty-seven thousand, six hundred sixty-one".