66125756628222 has 16 divisors (see below), whose sum is σ = 134225416440192. Its totient is φ = 21712935012120.

The previous prime is 66125756628091. The next prime is 66125756628223. The reversal of 66125756628222 is 22282665752166.

It is a super-4 number, since 4×66125756628222⁴ (a number of 56 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66125756628223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82245965554 + ... + 82245966357.

It is an arithmetic number, because the mean of its divisors is an integer number (8389088527512).

Almost surely, 2^{66125756628222} is an apocalyptic number.

66125756628222 is an abundant number, since it is smaller than the sum of its proper divisors (68099659811970).

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

66125756628222 is a wasteful number, since it uses less digits than its factorization.

66125756628222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164491931983.

The product of its digits is 58060800, while the sum is 60.

The spelling of 66125756628222 in words is "sixty-six trillion, one hundred twenty-five billion, seven hundred fifty-six million, six hundred twenty-eight thousand, two hundred twenty-two".