166304399 has 2 divisors, whose sum is σ = 166304400. Its totient is φ = 166304398.

The previous prime is 166304393. The next prime is 166304419. The reversal of 166304399 is 993403661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166304399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166304393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83152199 + 83152200.

It is an arithmetic number, because the mean of its divisors is an integer number (83152200).

Almost surely, 2^166304399 is an apocalyptic number.

166304399 is a deficient number, since it is larger than the sum of its proper divisors (1).

166304399 is an equidigital number, since it uses as much as digits as its factorization.

166304399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 166304399 is about 12895.9062884312. The cubic root of 166304399 is about 549.9221917478.

The spelling of 166304399 in words is "one hundred sixty-six million, three hundred four thousand, three hundred ninety-nine".