166798031 has 2 divisors, whose sum is σ = 166798032. Its totient is φ = 166798030.

The previous prime is 166798007. The next prime is 166798039. The reversal of 166798031 is 130897661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166798031 - 2¹⁴ = 166781647 is a prime.

It is a super-2 number, since 2×166798031² = 55643166290953922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166798031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166798039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83399015 + 83399016.

It is an arithmetic number, because the mean of its divisors is an integer number (83399016).

Almost surely, 2^166798031 is an apocalyptic number.

166798031 is a deficient number, since it is larger than the sum of its proper divisors (1).

166798031 is an equidigital number, since it uses as much as digits as its factorization.

166798031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 166798031 is about 12915.0312039886. The cubic root of 166798031 is about 550.4657553363.

The spelling of 166798031 in words is "one hundred sixty-six million, seven hundred ninety-eight thousand, thirty-one".