166430999 has 6 divisors (see below), whose sum is σ = 193603464. Its totient is φ = 142655100.

The previous prime is 166430993. The next prime is 166431007. The reversal of 166430999 is 999034661.

It is not a de Polignac number, because 166430999 - 2¹² = 166426903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166430993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1698227 + ... + 1698324.

It is an arithmetic number, because the mean of its divisors is an integer number (32267244).

Almost surely, 2^166430999 is an apocalyptic number.

166430999 is a deficient number, since it is larger than the sum of its proper divisors (27172465).

166430999 is an equidigital number, since it uses as much as digits as its factorization.

166430999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3396565 (or 3396558 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 166430999 is about 12900.8138890537. The cubic root of 166430999 is about 550.0616999652.

The spelling of 166430999 in words is "one hundred sixty-six million, four hundred thirty thousand, nine hundred ninety-nine".