166975305725 has 6 divisors (see below), whose sum is σ = 207049379130. Its totient is φ = 133580244560.

The previous prime is 166975305697. The next prime is 166975305743. The reversal of 166975305725 is 527503579661.

It can be written as a sum of positive squares in 3 ways, for example, as 28679083801 + 138296221924 = 169349^2 + 371882^2 .

It is not a de Polignac number, because 166975305725 - 2⁶ = 166975305661 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3339506090 + ... + 3339506139.

It is an arithmetic number, because the mean of its divisors is an integer number (34508229855).

Almost surely, 2^166975305725 is an apocalyptic number.

It is an amenable number.

166975305725 is a deficient number, since it is larger than the sum of its proper divisors (40074073405).

166975305725 is an equidigital number, since it uses as much as digits as its factorization.

166975305725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6679012239 (or 6679012234 counting only the distinct ones).

The product of its (nonzero) digits is 11907000, while the sum is 56.

The spelling of 166975305725 in words is "one hundred sixty-six billion, nine hundred seventy-five million, three hundred five thousand, seven hundred twenty-five".