668888235169 has 16 divisors (see below), whose sum is σ = 841318577280. Its totient is φ = 516599112960.

The previous prime is 668888235151. The next prime is 668888235199. The reversal of 668888235169 is 961532888866.

It is not a de Polignac number, because 668888235169 - 2¹¹ = 668888233121 is a prime.

It is a super-2 number, since 2×668888235169² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 668888235098 and 668888235107.

It is not an unprimeable number, because it can be changed into a prime (668888235109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38428734 + ... + 38446135.

It is an arithmetic number, because the mean of its divisors is an integer number (52582411080).

Almost surely, 2^668888235169 is an apocalyptic number.

It is an amenable number.

668888235169 is a deficient number, since it is larger than the sum of its proper divisors (172430342111).

668888235169 is a wasteful number, since it uses less digits than its factorization.

668888235169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76875000.

The product of its digits is 238878720, while the sum is 70.

The spelling of 668888235169 in words is "six hundred sixty-eight billion, eight hundred eighty-eight million, two hundred thirty-five thousand, one hundred sixty-nine".