166904254442 has 16 divisors (see below), whose sum is σ = 250777078920. Its totient is φ = 83311987968.

The previous prime is 166904254441. The next prime is 166904254453. The reversal of 166904254442 is 244452409661.

It can be written as a sum of positive squares in 4 ways, for example, as 166871433001 + 32821441 = 408499^2 + 5729^2 .

It is not an unprimeable number, because it can be changed into a prime (166904254441) 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, 3824288 + ... + 3867684.

Almost surely, 2^166904254442 is an apocalyptic number.

166904254442 is a deficient number, since it is larger than the sum of its proper divisors (83872824478).

166904254442 is a wasteful number, since it uses less digits than its factorization.

166904254442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46585.

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 166904254442 in words is "one hundred sixty-six billion, nine hundred four million, two hundred fifty-four thousand, four hundred forty-two".