667212601636 has 96 divisors (see below), whose sum is σ = 1368257184000. Its totient is φ = 278773068288.

The previous prime is 667212601621. The next prime is 667212601667. The reversal of 667212601636 is 636106212766.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167261130 + ... + 167265118.

It is an arithmetic number, because the mean of its divisors is an integer number (14252679000).

Almost surely, 2^667212601636 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 667212601636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684128592000).

667212601636 is an abundant number, since it is smaller than the sum of its proper divisors (701044582364).

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

667212601636 is a wasteful number, since it uses less digits than its factorization.

667212601636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4741 (or 4739 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 667212601636 in words is "six hundred sixty-seven billion, two hundred twelve million, six hundred one thousand, six hundred thirty-six".