166025617057 has 2 divisors, whose sum is σ = 166025617058. Its totient is φ = 166025617056.

The previous prime is 166025616989. The next prime is 166025617063. The reversal of 166025617057 is 750716520661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106217979921 + 59807637136 = 325911^2 + 244556^2 .

It is a cyclic number.

It is not a de Polignac number, because 166025617057 - 2²⁷ = 165891399329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166025616998 and 166025617016.

It is not a weakly prime, because it can be changed into another prime (166025617097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83012808528 + 83012808529.

It is an arithmetic number, because the mean of its divisors is an integer number (83012808529).

Almost surely, 2^166025617057 is an apocalyptic number.

It is an amenable number.

166025617057 is a deficient number, since it is larger than the sum of its proper divisors (1).

166025617057 is an equidigital number, since it uses as much as digits as its factorization.

166025617057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 166025617057 in words is "one hundred sixty-six billion, twenty-five million, six hundred seventeen thousand, fifty-seven".