166400900226 has 48 divisors (see below), whose sum is σ = 393448805568. Its totient is φ = 50406876000.

The previous prime is 166400900213. The next prime is 166400900257. The reversal of 166400900226 is 622009004661.

166400900226 is a `hidden beast` number, since 1 + 6 + 640 + 0 + 9 + 0 + 0 + 2 + 2 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 426076 + ... + 717176.

It is an arithmetic number, because the mean of its divisors is an integer number (8196850116).

Almost surely, 2^166400900226 is an apocalyptic number.

166400900226 is an abundant number, since it is smaller than the sum of its proper divisors (227047905342).

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

166400900226 is a wasteful number, since it uses less digits than its factorization.

166400900226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294007 (or 294004 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

Adding to 166400900226 its reverse (622009004661), we get a palindrome (788409904887).

The spelling of 166400900226 in words is "one hundred sixty-six billion, four hundred million, nine hundred thousand, two hundred twenty-six".