66775852296128 has 28 divisors (see below), whose sum is σ = 136782794223552. Its totient is φ = 32310896271360.

The previous prime is 66775852296071. The next prime is 66775852296149. The reversal of 66775852296128 is 82169225857766.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16828589825 + ... + 16828593792.

Almost surely, 2^{66775852296128} is an apocalyptic number.

It is an amenable number.

66775852296128 is an abundant number, since it is smaller than the sum of its proper divisors (70006941927424).

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

66775852296128 is a wasteful number, since it uses less digits than its factorization.

66775852296128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33657183660 (or 33657183650 counting only the distinct ones).

The product of its digits is 1219276800, while the sum is 74.

The spelling of 66775852296128 in words is "sixty-six trillion, seven hundred seventy-five billion, eight hundred fifty-two million, two hundred ninety-six thousand, one hundred twenty-eight".