164166257 has 2 divisors, whose sum is σ = 164166258. Its totient is φ = 164166256.

The previous prime is 164166227. The next prime is 164166283. The reversal of 164166257 is 752661461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155351296 + 8814961 = 12464^2 + 2969^2 .

It is an emirp because it is prime and its reverse (752661461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164166257 - 2⁶ = 164166193 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164166257.

It is not a weakly prime, because it can be changed into another prime (164166227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82083128 + 82083129.

It is an arithmetic number, because the mean of its divisors is an integer number (82083129).

Almost surely, 2^164166257 is an apocalyptic number.

It is an amenable number.

164166257 is a deficient number, since it is larger than the sum of its proper divisors (1).

164166257 is an equidigital number, since it uses as much as digits as its factorization.

164166257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 164166257 is about 12812.7380758369. The cubic root of 164166257 is about 547.5552728057. Note that the first 3 decimals are identical.

The spelling of 164166257 in words is "one hundred sixty-four million, one hundred sixty-six thousand, two hundred fifty-seven".