166675919 has 2 divisors, whose sum is σ = 166675920. Its totient is φ = 166675918.

The previous prime is 166675913. The next prime is 166675969. The reversal of 166675919 is 919576661.

It is an a-pointer prime, because the next prime (166675969) can be obtained adding 166675919 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166675919 - 2⁴ = 166675903 is a prime.

It is a super-2 number, since 2×166675919² = 55561723948989122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166675913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83337959 + 83337960.

It is an arithmetic number, because the mean of its divisors is an integer number (83337960).

Almost surely, 2^166675919 is an apocalyptic number.

166675919 is a deficient number, since it is larger than the sum of its proper divisors (1).

166675919 is an equidigital number, since it uses as much as digits as its factorization.

166675919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 50.

The square root of 166675919 is about 12910.3028237141. The cubic root of 166675919 is about 550.3313914712.

The spelling of 166675919 in words is "one hundred sixty-six million, six hundred seventy-five thousand, nine hundred nineteen".