67656964032 has 168 divisors, whose sum is σ = 226153980000. Its totient is φ = 19330504704.

The previous prime is 67656963991. The next prime is 67656964051. The reversal of 67656964032 is 23046965676.

67656964032 is a `hidden beast` number, since 6 + 7 + 6 + 569 + 6 + 40 + 32 = 666.

67656964032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (168).

It is a self number, because there is not a number n which added to its sum of digits gives 67656964032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26344 + ... + 368792.

Almost surely, 2^67656964032 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 67656964032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113076990000).

67656964032 is an abundant number, since it is smaller than the sum of its proper divisors (158497015968).

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

67656964032 is a wasteful number, since it uses less digits than its factorization.

67656964032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342488 (or 342461 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 67656964032 in words is "sixty-seven billion, six hundred fifty-six million, nine hundred sixty-four thousand, thirty-two".