166428419975 has 12 divisors (see below), whose sum is σ = 217232885640. Its totient is φ = 126135223200.

The previous prime is 166428419947. The next prime is 166428419987. The reversal of 166428419975 is 579914824661.

It is not a de Polignac number, because 166428419975 - 2⁸ = 166428419719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175187336 + ... + 175188285.

It is an arithmetic number, because the mean of its divisors is an integer number (18102740470).

Almost surely, 2^166428419975 is an apocalyptic number.

166428419975 is a deficient number, since it is larger than the sum of its proper divisors (50804465665).

166428419975 is a wasteful number, since it uses less digits than its factorization.

166428419975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350375650 (or 350375645 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 62.

The spelling of 166428419975 in words is "one hundred sixty-six billion, four hundred twenty-eight million, four hundred nineteen thousand, nine hundred seventy-five".