166583231 has 2 divisors, whose sum is σ = 166583232. Its totient is φ = 166583230.

The previous prime is 166583201. The next prime is 166583303. The reversal of 166583231 is 132385661.

It is a weak prime.

It is an emirp because it is prime and its reverse (132385661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166583231 - 2¹⁸ = 166321087 is a prime.

It is a super-2 number, since 2×166583231² = 55499945700798722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166583191 and 166583200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166583201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83291615 + 83291616.

It is an arithmetic number, because the mean of its divisors is an integer number (83291616).

Almost surely, 2^166583231 is an apocalyptic number.

166583231 is a deficient number, since it is larger than the sum of its proper divisors (1).

166583231 is an equidigital number, since it uses as much as digits as its factorization.

166583231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 166583231 is about 12906.7126333548. The cubic root of 166583231 is about 550.2293599868.

The spelling of 166583231 in words is "one hundred sixty-six million, five hundred eighty-three thousand, two hundred thirty-one".