667136330028 has 576 divisors, whose sum is σ = 2089650920448. Its totient is φ = 182204743680.

The previous prime is 667136330023. The next prime is 667136330057. The reversal of 667136330028 is 820033631766.

667136330028 is a `hidden beast` number, since 6 + 6 + 7 + 1 + 3 + 633 + 0 + 0 + 2 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (667136330023) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2938926451 + ... + 2938926677.

Almost surely, 2^667136330028 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 667136330028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1044825460224).

667136330028 is an abundant number, since it is smaller than the sum of its proper divisors (1422514590420).

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

667136330028 is a wasteful number, since it uses less digits than its factorization.

667136330028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 667136330028 in words is "six hundred sixty-seven billion, one hundred thirty-six million, three hundred thirty thousand, twenty-eight".