667485185864 has 64 divisors (see below), whose sum is σ = 1506849820800. Its totient is φ = 270785078784.

The previous prime is 667485185821. The next prime is 667485185977. The reversal of 667485185864 is 468581584766.

It is a junction number, because it is equal to n+sod(n) for n = 667485185794 and 667485185803.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1032044 + ... + 1549220.

It is an arithmetic number, because the mean of its divisors is an integer number (23544528450).

Almost surely, 2^667485185864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667485185864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753424910400).

667485185864 is an abundant number, since it is smaller than the sum of its proper divisors (839364634936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667485185864 is a wasteful number, since it uses less digits than its factorization.

667485185864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518422 (or 518418 counting only the distinct ones).

The product of its digits is 309657600, while the sum is 68.

The spelling of 667485185864 in words is "six hundred sixty-seven billion, four hundred eighty-five million, one hundred eighty-five thousand, eight hundred sixty-four".