166375375253 has 2 divisors, whose sum is σ = 166375375254. Its totient is φ = 166375375252.

The previous prime is 166375375249. The next prime is 166375375307. The reversal of 166375375253 is 352573573661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127793380324 + 38581994929 = 357482^2 + 196423^2 .

It is a cyclic number.

It is not a de Polignac number, because 166375375253 - 2² = 166375375249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166375375195 and 166375375204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166375375213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83187687626 + 83187687627.

It is an arithmetic number, because the mean of its divisors is an integer number (83187687627).

Almost surely, 2^166375375253 is an apocalyptic number.

It is an amenable number.

166375375253 is a deficient number, since it is larger than the sum of its proper divisors (1).

166375375253 is an equidigital number, since it uses as much as digits as its factorization.

166375375253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11907000, while the sum is 53.

The spelling of 166375375253 in words is "one hundred sixty-six billion, three hundred seventy-five million, three hundred seventy-five thousand, two hundred fifty-three".