716507705 has 8 divisors (see below), whose sum is σ = 860817672. Its totient is φ = 572533888.

The previous prime is 716507663. The next prime is 716507723. The reversal of 716507705 is 507705617.

It can be written as a sum of positive squares in 4 ways, for example, as 317267344 + 399240361 = 17812^2 + 19981^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 716507705 - 2⁶ = 716507641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79322 + ... + 87891.

It is an arithmetic number, because the mean of its divisors is an integer number (107602209).

Almost surely, 2^716507705 is an apocalyptic number.

It is an amenable number.

716507705 is a deficient number, since it is larger than the sum of its proper divisors (144309967).

716507705 is a wasteful number, since it uses less digits than its factorization.

716507705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168075.

The product of its (nonzero) digits is 51450, while the sum is 38.

The square root of 716507705 is about 26767.6615527020. The cubic root of 716507705 is about 894.8294901084.

The spelling of 716507705 in words is "seven hundred sixteen million, five hundred seven thousand, seven hundred five".