668888235170 has 64 divisors (see below), whose sum is σ = 1242129378816. Its totient is φ = 259148885760.

The previous prime is 668888235151. The next prime is 668888235199. The reversal of 668888235170 is 71532888866.

It is a super-2 number, since 2×668888235170² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179180624 + ... + 179184356.

It is an arithmetic number, because the mean of its divisors is an integer number (19408271544).

Almost surely, 2^668888235170 is an apocalyptic number.

668888235170 is a deficient number, since it is larger than the sum of its proper divisors (573241143646).

668888235170 is a wasteful number, since it uses less digits than its factorization.

668888235170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5835.

The product of its (nonzero) digits is 30965760, while the sum is 62.

The spelling of 668888235170 in words is "six hundred sixty-eight billion, eight hundred eighty-eight million, two hundred thirty-five thousand, one hundred seventy".