66722652792 has 192 divisors, whose sum is σ = 200727072000. Its totient is φ = 19926922752.

The previous prime is 66722652791. The next prime is 66722652833. The reversal of 66722652792 is 29725622766.

66722652792 is a `hidden beast` number, since 6 + 6 + 7 + 2 + 26 + 527 + 92 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66722652791) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2788383 + ... + 2812209.

It is an arithmetic number, because the mean of its divisors is an integer number (1045453500).

Almost surely, 2^66722652792 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 66722652792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100363536000).

66722652792 is an abundant number, since it is smaller than the sum of its proper divisors (134004419208).

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

66722652792 is a wasteful number, since it uses less digits than its factorization.

66722652792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23970 (or 23963 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 54.

The spelling of 66722652792 in words is "sixty-six billion, seven hundred twenty-two million, six hundred fifty-two thousand, seven hundred ninety-two".