166486231 has 2 divisors, whose sum is σ = 166486232. Its totient is φ = 166486230.

The previous prime is 166486217. The next prime is 166486261. The reversal of 166486231 is 132684661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166486231 is a prime.

It is a super-2 number, since 2×166486231² = 55435330225170722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166486261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83243115 + 83243116.

It is an arithmetic number, because the mean of its divisors is an integer number (83243116).

Almost surely, 2^166486231 is an apocalyptic number.

166486231 is a deficient number, since it is larger than the sum of its proper divisors (1).

166486231 is an equidigital number, since it uses as much as digits as its factorization.

166486231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 166486231 is about 12902.9543516204. The cubic root of 166486231 is about 550.1225412905.

The spelling of 166486231 in words is "one hundred sixty-six million, four hundred eighty-six thousand, two hundred thirty-one".