668887560898 has 8 divisors (see below), whose sum is σ = 1012210380108. Its totient is φ = 331484100864.

The previous prime is 668887560851. The next prime is 668887560907. The reversal of 668887560898 is 898065788866.

It can be written as a sum of positive squares in 2 ways, for example, as 443645248489 + 225242312409 = 666067^2 + 474597^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1479839511 + ... + 1479839962.

Almost surely, 2^668887560898 is an apocalyptic number.

668887560898 is a deficient number, since it is larger than the sum of its proper divisors (343322819210).

668887560898 is a wasteful number, since it uses less digits than its factorization.

668887560898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2959679588.

The product of its (nonzero) digits is 2229534720, while the sum is 79.

The spelling of 668887560898 in words is "six hundred sixty-eight billion, eight hundred eighty-seven million, five hundred sixty thousand, eight hundred ninety-eight".