667655880192 has 540 divisors, whose sum is σ = 2365967425536. Its totient is φ = 180696821760.

The previous prime is 667655880161. The next prime is 667655880209. The reversal of 667655880192 is 291088556766.

667655880192 is a `hidden beast` number, since 6 + 6 + 76 + 558 + 8 + 0 + 1 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 81506817 + ... + 81515007.

Almost surely, 2^667655880192 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 667655880192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1182983712768).

667655880192 is an abundant number, since it is smaller than the sum of its proper divisors (1698311545344).

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

667655880192 is a wasteful number, since it uses less digits than its factorization.

667655880192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8267 (or 8222 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 667655880192 in words is "six hundred sixty-seven billion, six hundred fifty-five million, eight hundred eighty thousand, one hundred ninety-two".