166579907825 has 6 divisors (see below), whose sum is σ = 206559085734. Its totient is φ = 133263926240.

The previous prime is 166579907807. The next prime is 166579907833. The reversal of 166579907825 is 528709975661.

It can be written as a sum of positive squares in 3 ways, for example, as 51437584 + 166528470241 = 7172^2 + 408079^2 .

It is not a de Polignac number, because 166579907825 - 2⁶ = 166579907761 is a prime.

It is a Duffinian 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, 3331598132 + ... + 3331598181.

It is an arithmetic number, because the mean of its divisors is an integer number (34426514289).

Almost surely, 2^166579907825 is an apocalyptic number.

It is an amenable number.

166579907825 is a deficient number, since it is larger than the sum of its proper divisors (39979177909).

166579907825 is an equidigital number, since it uses as much as digits as its factorization.

166579907825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6663196323 (or 6663196318 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 65.

The spelling of 166579907825 in words is "one hundred sixty-six billion, five hundred seventy-nine million, nine hundred seven thousand, eight hundred twenty-five".