166044433 has 2 divisors, whose sum is σ = 166044434. Its totient is φ = 166044432.

The previous prime is 166044427. The next prime is 166044443. The reversal of 166044433 is 334440661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105329169 + 60715264 = 10263^2 + 7792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166044433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166044395 and 166044404.

It is not a weakly prime, because it can be changed into another prime (166044443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83022216 + 83022217.

It is an arithmetic number, because the mean of its divisors is an integer number (83022217).

Almost surely, 2^166044433 is an apocalyptic number.

It is an amenable number.

166044433 is a deficient number, since it is larger than the sum of its proper divisors (1).

166044433 is an equidigital number, since it uses as much as digits as its factorization.

166044433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 166044433 is about 12885.8229461684. The cubic root of 166044433 is about 549.6354973287.

The spelling of 166044433 in words is "one hundred sixty-six million, forty-four thousand, four hundred thirty-three".