668825206585 has 8 divisors (see below), whose sum is σ = 803346701256. Its totient is φ = 534555863040.

The previous prime is 668825206571. The next prime is 668825206663. The reversal of 668825206585 is 585602528866.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 147200366889 + 521624839696 = 383667^2 + 722236^2 .

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

It is not a de Polignac number, because 668825206585 - 2⁷ = 668825206457 is a prime.

It is a Duffinian 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, 63031944 + ... + 63042553.

It is an arithmetic number, because the mean of its divisors is an integer number (100418337657).

Almost surely, 2^668825206585 is an apocalyptic number.

It is an amenable number.

668825206585 is a deficient number, since it is larger than the sum of its proper divisors (134521494671).

668825206585 is a wasteful number, since it uses less digits than its factorization.

668825206585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126075563.

The product of its (nonzero) digits is 55296000, while the sum is 61.

The spelling of 668825206585 in words is "six hundred sixty-eight billion, eight hundred twenty-five million, two hundred six thousand, five hundred eighty-five".