166484431 has 2 divisors, whose sum is σ = 166484432. Its totient is φ = 166484430.

The previous prime is 166484413. The next prime is 166484443. The reversal of 166484431 is 134484661.

Together with previous prime (166484413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166484431 - 2⁵ = 166484399 is a prime.

It is a super-2 number, since 2×166484431² = 55434131530787522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166484401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83242215 + 83242216.

It is an arithmetic number, because the mean of its divisors is an integer number (83242216).

Almost surely, 2^166484431 is an apocalyptic number.

166484431 is a deficient number, since it is larger than the sum of its proper divisors (1).

166484431 is an equidigital number, since it uses as much as digits as its factorization.

166484431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 37.

The square root of 166484431 is about 12902.8845999645. The cubic root of 166484431 is about 550.1205586959.

The spelling of 166484431 in words is "one hundred sixty-six million, four hundred eighty-four thousand, four hundred thirty-one".