716664577 has 4 divisors (see below), whose sum is σ = 717417540. Its totient is φ = 715911616.

The previous prime is 716664551. The next prime is 716664587. The reversal of 716664577 is 775466617.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 271623361 + 445041216 = 16481^2 + 21096^2 .

It is a cyclic number.

It is not a de Polignac number, because 716664577 - 2⁷ = 716664449 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 716664577.

It is not an unprimeable number, because it can be changed into a prime (716664587) 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, 375052 + ... + 376957.

It is an arithmetic number, because the mean of its divisors is an integer number (179354385).

Almost surely, 2^716664577 is an apocalyptic number.

It is an amenable number.

716664577 is a deficient number, since it is larger than the sum of its proper divisors (752963).

716664577 is an equidigital number, since it uses as much as digits as its factorization.

716664577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752962.

The product of its digits is 1481760, while the sum is 49.

The square root of 716664577 is about 26770.5916445640. The cubic root of 716664577 is about 894.8947899173.

The spelling of 716664577 in words is "seven hundred sixteen million, six hundred sixty-four thousand, five hundred seventy-seven".