166404079 has 2 divisors, whose sum is σ = 166404080. Its totient is φ = 166404078.

The previous prime is 166404053. The next prime is 166404083. The reversal of 166404079 is 970404661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166404079 - 2¹⁵ = 166371311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166404089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83202039 + 83202040.

It is an arithmetic number, because the mean of its divisors is an integer number (83202040).

Almost surely, 2^166404079 is an apocalyptic number.

166404079 is a deficient number, since it is larger than the sum of its proper divisors (1).

166404079 is an equidigital number, since it uses as much as digits as its factorization.

166404079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 166404079 is about 12899.7705018345. The cubic root of 166404079 is about 550.0320411086.

The spelling of 166404079 in words is "one hundred sixty-six million, four hundred four thousand, seventy-nine".