166842758425 has 24 divisors (see below), whose sum is σ = 246720030336. Its totient is φ = 109432266240.

The previous prime is 166842758413. The next prime is 166842758449. The reversal of 166842758425 is 524857248661.

166842758425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166842758425 - 2¹⁹ = 166842234137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166842758425.

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 23 ways as a sum of consecutive naturals, for example, 20721784 + ... + 20729833.

It is an arithmetic number, because the mean of its divisors is an integer number (10280001264).

Almost surely, 2^166842758425 is an apocalyptic number.

It is an amenable number.

166842758425 is a deficient number, since it is larger than the sum of its proper divisors (79877271911).

166842758425 is a wasteful number, since it uses less digits than its factorization.

166842758425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41451657 (or 41451652 counting only the distinct ones).

The product of its digits is 25804800, while the sum is 58.

The spelling of 166842758425 in words is "one hundred sixty-six billion, eight hundred forty-two million, seven hundred fifty-eight thousand, four hundred twenty-five".