166366627825 has 12 divisors (see below), whose sum is σ = 218429596620. Its totient is φ = 125264284160.

The previous prime is 166366627759. The next prime is 166366627831. The reversal of 166366627825 is 528726663661.

It can be written as a sum of positive squares in 6 ways, for example, as 19929533584 + 146437094241 = 141172^2 + 382671^2 .

It is not a de Polignac number, because 166366627825 - 2¹³ = 166366619633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166366627825.

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, 195725020 + ... + 195725869.

It is an arithmetic number, because the mean of its divisors is an integer number (18202466385).

Almost surely, 2^166366627825 is an apocalyptic number.

It is an amenable number.

166366627825 is a deficient number, since it is larger than the sum of its proper divisors (52062968795).

166366627825 is a wasteful number, since it uses less digits than its factorization.

166366627825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391450916 (or 391450911 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 58.

The spelling of 166366627825 in words is "one hundred sixty-six billion, three hundred sixty-six million, six hundred twenty-seven thousand, eight hundred twenty-five".