225661166522 has 16 divisors (see below), whose sum is σ = 390985123392. Its totient is φ = 96539536320.

The previous prime is 225661166491. The next prime is 225661166537.

225661166522 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301685678 + ... + 301686425.

It is an arithmetic number, because the mean of its divisors is an integer number (24436570212).

Almost surely, 2^225661166522 is an apocalyptic number.

225661166522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

225661166522 is a deficient number, since it is larger than the sum of its proper divisors (165323956870).

225661166522 is a wasteful number, since it uses less digits than its factorization.

225661166522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603372133.

The product of its digits is 518400, while the sum is 44.

The spelling of 225661166522 in words is "two hundred twenty-five billion, six hundred sixty-one million, one hundred sixty-six thousand, five hundred twenty-two".