166636331 has 2 divisors, whose sum is σ = 166636332. Its totient is φ = 166636330.

The previous prime is 166636279. The next prime is 166636369. The reversal of 166636331 is 133636661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166636331 - 2¹⁰ = 166635307 is a prime.

It is a super-2 number, since 2×166636331² = 55535333618283122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 166636291 and 166636300.

It is not a weakly prime, because it can be changed into another prime (166636381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83318165 + 83318166.

It is an arithmetic number, because the mean of its divisors is an integer number (83318166).

Almost surely, 2^166636331 is an apocalyptic number.

166636331 is a deficient number, since it is larger than the sum of its proper divisors (1).

166636331 is an equidigital number, since it uses as much as digits as its factorization.

166636331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 35.

The square root of 166636331 is about 12908.7695385734. The cubic root of 166636331 is about 550.2878174017.

The spelling of 166636331 in words is "one hundred sixty-six million, six hundred thirty-six thousand, three hundred thirty-one".