667668106885 has 32 divisors (see below), whose sum is σ = 870259219200. Its totient is φ = 488821132800.

The previous prime is 667668106879. The next prime is 667668106961. The reversal of 667668106885 is 588601866766.

It is not a de Polignac number, because 667668106885 - 2²¹ = 667666009733 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 667668106885.

It is a congruent number.

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, 3542890 + ... + 3726580.

It is an arithmetic number, because the mean of its divisors is an integer number (27195600600).

Almost surely, 2^667668106885 is an apocalyptic number.

667668106885 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

667668106885 is a deficient number, since it is larger than the sum of its proper divisors (202591112315).

667668106885 is a wasteful number, since it uses less digits than its factorization.

667668106885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184189.

The product of its (nonzero) digits is 139345920, while the sum is 67.

The spelling of 667668106885 in words is "six hundred sixty-seven billion, six hundred sixty-eight million, one hundred six thousand, eight hundred eighty-five".