716663409 has 16 divisors (see below), whose sum is σ = 1191336960. Its totient is φ = 372292560.

The previous prime is 716663401. The next prime is 716663419. The reversal of 716663409 is 904366617.

It is not a de Polignac number, because 716663409 - 2³ = 716663401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (716663401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1550989 + ... + 1551450.

It is an arithmetic number, because the mean of its divisors is an integer number (74458560).

Almost surely, 2^716663409 is an apocalyptic number.

It is an amenable number.

716663409 is a deficient number, since it is larger than the sum of its proper divisors (474673551).

716663409 is a wasteful number, since it uses less digits than its factorization.

716663409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102460.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 716663409 is about 26770.5698295722. The cubic root of 716663409 is about 894.8943037588.

The spelling of 716663409 in words is "seven hundred sixteen million, six hundred sixty-three thousand, four hundred nine".