166375375249 has 2 divisors, whose sum is σ = 166375375250. Its totient is φ = 166375375248.

The previous prime is 166375375213. The next prime is 166375375253. The reversal of 166375375249 is 942573573661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130705387024 + 35669988225 = 361532^2 + 188865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166375375249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166375375193 and 166375375202.

It is not a weakly prime, because it can be changed into another prime (166375375949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83187687624 + 83187687625.

It is an arithmetic number, because the mean of its divisors is an integer number (83187687625).

Almost surely, 2^166375375249 is an apocalyptic number.

It is an amenable number.

166375375249 is a deficient number, since it is larger than the sum of its proper divisors (1).

166375375249 is an equidigital number, since it uses as much as digits as its factorization.

166375375249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28576800, while the sum is 58.

The spelling of 166375375249 in words is "one hundred sixty-six billion, three hundred seventy-five million, three hundred seventy-five thousand, two hundred forty-nine".