166963399 has 2 divisors, whose sum is σ = 166963400. Its totient is φ = 166963398.

The previous prime is 166963343. The next prime is 166963421. The reversal of 166963399 is 993369661.

It is a strong prime.

It is an emirp because it is prime and its reverse (993369661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166963399 - 2⁷ = 166963271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166963319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83481699 + 83481700.

It is an arithmetic number, because the mean of its divisors is an integer number (83481700).

Almost surely, 2^166963399 is an apocalyptic number.

166963399 is a deficient number, since it is larger than the sum of its proper divisors (1).

166963399 is an equidigital number, since it uses as much as digits as its factorization.

166963399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417176, while the sum is 52.

The square root of 166963399 is about 12921.4317705121. The cubic root of 166963399 is about 550.6476107096.

The spelling of 166963399 in words is "one hundred sixty-six million, nine hundred sixty-three thousand, three hundred ninety-nine".