668713595 has 16 divisors (see below), whose sum is σ = 883913472. Its totient is φ = 481611360.

The previous prime is 668713559. The next prime is 668713601. The reversal of 668713595 is 595317866.

It is a happy number.

It is not a de Polignac number, because 668713595 - 2¹⁰ = 668712571 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53357 + ... + 64686.

It is an arithmetic number, because the mean of its divisors is an integer number (55244592).

Almost surely, 2^668713595 is an apocalyptic number.

668713595 is a deficient number, since it is larger than the sum of its proper divisors (215199877).

668713595 is a wasteful number, since it uses less digits than its factorization.

668713595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118162.

The product of its digits is 1360800, while the sum is 50.

The square root of 668713595 is about 25859.4971915542. The cubic root of 668713595 is about 874.4736295392.

The spelling of 668713595 in words is "six hundred sixty-eight million, seven hundred thirteen thousand, five hundred ninety-five".