166642256154 has 32 divisors (see below), whose sum is σ = 363738885120. Its totient is φ = 50476017200.

The previous prime is 166642256149. The next prime is 166642256173. The reversal of 166642256154 is 451652246661.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 385362 + ... + 694109.

It is an arithmetic number, because the mean of its divisors is an integer number (11366840160).

Almost surely, 2^166642256154 is an apocalyptic number.

166642256154 is an abundant number, since it is smaller than the sum of its proper divisors (197096628966).

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

166642256154 is a wasteful number, since it uses less digits than its factorization.

166642256154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081826.

The product of its digits is 2073600, while the sum is 48.

The spelling of 166642256154 in words is "one hundred sixty-six billion, six hundred forty-two million, two hundred fifty-six thousand, one hundred fifty-four".