85666125255522 has 16 divisors (see below), whose sum is σ = 195808286298432. Its totient is φ = 24476035787280.

The previous prime is 85666125255517. The next prime is 85666125255523. The reversal of 85666125255522 is 22555252166658.

It is not an unprimeable number, because it can be changed into a prime (85666125255523) 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, 1019834824429 + ... + 1019834824512.

It is an arithmetic number, because the mean of its divisors is an integer number (12238017893652).

Almost surely, 2^{85666125255522} is an apocalyptic number.

85666125255522 is an abundant number, since it is smaller than the sum of its proper divisors (110142161042910).

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

85666125255522 is a wasteful number, since it uses less digits than its factorization.

85666125255522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039669648953.

The product of its digits is 86400000, while the sum is 60.

The spelling of 85666125255522 in words is "eighty-five trillion, six hundred sixty-six billion, one hundred twenty-five million, two hundred fifty-five thousand, five hundred twenty-two".