667513881056 has 96 divisors (see below), whose sum is σ = 1442063347200. Its totient is φ = 301635532800.

The previous prime is 667513881007. The next prime is 667513881061. The reversal of 667513881056 is 650188315766.

667513881056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 667513880992 and 667513881010.

It is a congruent number.

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, 72559145 + ... + 72568343.

It is an arithmetic number, because the mean of its divisors is an integer number (15021493200).

Almost surely, 2^667513881056 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 667513881056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (721031673600).

667513881056 is an abundant number, since it is smaller than the sum of its proper divisors (774549466144).

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

667513881056 is a wasteful number, since it uses less digits than its factorization.

667513881056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10408 (or 10400 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 667513881056 in words is "six hundred sixty-seven billion, five hundred thirteen million, eight hundred eighty-one thousand, fifty-six".