166256119 has 2 divisors, whose sum is σ = 166256120. Its totient is φ = 166256118.

The previous prime is 166256117. The next prime is 166256173. The reversal of 166256119 is 911652661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166256119 - 2¹ = 166256117 is a prime.

It is a super-2 number, since 2×166256119² = 55282194209884322, which contains 22 as substring.

Together with 166256117, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166256117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83128059 + 83128060.

It is an arithmetic number, because the mean of its divisors is an integer number (83128060).

Almost surely, 2^166256119 is an apocalyptic number.

166256119 is a deficient number, since it is larger than the sum of its proper divisors (1).

166256119 is an equidigital number, since it uses as much as digits as its factorization.

166256119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 166256119 is about 12894.0342406867. The cubic root of 166256119 is about 549.8689704395.

It can be divided in two parts, 166256 and 119, that added together give a cube (166375 = 55³).

The spelling of 166256119 in words is "one hundred sixty-six million, two hundred fifty-six thousand, one hundred nineteen".