66256674192 has 100 divisors (see below), whose sum is σ = 193276486656. Its totient is φ = 21911601600.

The previous prime is 66256674109. The next prime is 66256674193. The reversal of 66256674192 is 29147665266.

66256674192 is a `hidden beast` number, since 6 + 6 + 2 + 566 + 74 + 1 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (66256674193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36684 + ... + 365867.

Almost surely, 2^66256674192 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 66256674192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96638243328).

66256674192 is an abundant number, since it is smaller than the sum of its proper divisors (127019812464).

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

66256674192 is a wasteful number, since it uses less digits than its factorization.

66256674192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402698 (or 402683 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 66256674192 in words is "sixty-six billion, two hundred fifty-six million, six hundred seventy-four thousand, one hundred ninety-two".