166881042925 has 12 divisors (see below), whose sum is σ = 209425658400. Its totient is φ = 131896340720.

The previous prime is 166881042917. The next prime is 166881042943. The reversal of 166881042925 is 529240188661.

It is not a de Polignac number, because 166881042925 - 2³ = 166881042917 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, 40210225 + ... + 40214374.

It is an arithmetic number, because the mean of its divisors is an integer number (17452138200).

Almost surely, 2^166881042925 is an apocalyptic number.

It is an amenable number.

166881042925 is a deficient number, since it is larger than the sum of its proper divisors (42544615475).

166881042925 is an equidigital number, since it uses as much as digits as its factorization.

166881042925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80424692 (or 80424687 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 166881042925 in words is "one hundred sixty-six billion, eight hundred eighty-one million, forty-two thousand, nine hundred twenty-five".