68665530672 has 120 divisors (see below), whose sum is σ = 193207794624. Its totient is φ = 22765007232.

The previous prime is 68665530653. The next prime is 68665530679. The reversal of 68665530672 is 27603556686.

It is a happy number.

68665530672 is a `hidden beast` number, since 6 + 86 + 6 + 553 + 0 + 6 + 7 + 2 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (68665530679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27832383 + ... + 27834849.

Almost surely, 2^68665530672 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 68665530672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96603897312).

68665530672 is an abundant number, since it is smaller than the sum of its proper divisors (124542263952).

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

68665530672 is a wasteful number, since it uses less digits than its factorization.

68665530672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3447 (or 3438 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 68665530672 in words is "sixty-eight billion, six hundred sixty-five million, five hundred thirty thousand, six hundred seventy-two".