166023861458 has 32 divisors (see below), whose sum is σ = 306556233984. Its totient is φ = 65668917312.

The previous prime is 166023861403. The next prime is 166023861473. The reversal of 166023861458 is 854168320661.

166023861458 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1077491 + ... + 1221897.

It is an arithmetic number, because the mean of its divisors is an integer number (9579882312).

Almost surely, 2^166023861458 is an apocalyptic number.

166023861458 is a deficient number, since it is larger than the sum of its proper divisors (140532372526).

166023861458 is a wasteful number, since it uses less digits than its factorization.

166023861458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150746.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 166023861458 in words is "one hundred sixty-six billion, twenty-three million, eight hundred sixty-one thousand, four hundred fifty-eight".