66128252255334 has 48 divisors (see below), whose sum is σ = 143333245083600. Its totient is φ = 22034234257728.

The previous prime is 66128252255293. The next prime is 66128252255353. The reversal of 66128252255334 is 43355225282166.

It is a happy number.

66128252255334 is a `hidden beast` number, since 6 + 6 + 1 + 2 + 8 + 2 + 52 + 2 + 553 + 34 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 764860852 + ... + 764947304.

It is an arithmetic number, because the mean of its divisors is an integer number (2986109272575).

Almost surely, 2^{66128252255334} is an apocalyptic number.

66128252255334 is an abundant number, since it is smaller than the sum of its proper divisors (77204992828266).

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

66128252255334 is a wasteful number, since it uses less digits than its factorization.

66128252255334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102389 (or 102386 counting only the distinct ones).

The product of its digits is 20736000, while the sum is 54.

The spelling of 66128252255334 in words is "sixty-six trillion, one hundred twenty-eight billion, two hundred fifty-two million, two hundred fifty-five thousand, three hundred thirty-four".