166913833 has 2 divisors, whose sum is σ = 166913834. Its totient is φ = 166913832.

The previous prime is 166913797. The next prime is 166913839. The reversal of 166913833 is 338319661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165688384 + 1225449 = 12872^2 + 1107^2 .

It is an emirp because it is prime and its reverse (338319661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166913833 - 2⁹ = 166913321 is a prime.

It is not a weakly prime, because it can be changed into another prime (166913839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83456916 + 83456917.

It is an arithmetic number, because the mean of its divisors is an integer number (83456917).

Almost surely, 2^166913833 is an apocalyptic number.

It is an amenable number.

166913833 is a deficient number, since it is larger than the sum of its proper divisors (1).

166913833 is an equidigital number, since it uses as much as digits as its factorization.

166913833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 40.

The square root of 166913833 is about 12919.5136518369. The cubic root of 166913833 is about 550.5931155310.

The spelling of 166913833 in words is "one hundred sixty-six million, nine hundred thirteen thousand, eight hundred thirty-three".