66155265792 has 864 divisors, whose sum is σ = 256642154496. Its totient is φ = 15875481600.

The previous prime is 66155265751. The next prime is 66155265811. The reversal of 66155265792 is 29756255166.

66155265792 is a `hidden beast` number, since 6 + 6 + 15 + 52 + 6 + 579 + 2 = 666.

66155265792 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (6804000) is a multiple of the sum of its prime divisors (600).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 126491643 + ... + 126492165.

Almost surely, 2^66155265792 is an apocalyptic number.

66155265792 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66155265792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128321077248).

66155265792 is an abundant number, since it is smaller than the sum of its proper divisors (190486888704).

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

66155265792 is a wasteful number, since it uses less digits than its factorization.

66155265792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617 (or 600 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 54.

The spelling of 66155265792 in words is "sixty-six billion, one hundred fifty-five million, two hundred sixty-five thousand, seven hundred ninety-two".