166664963 has 2 divisors, whose sum is σ = 166664964. Its totient is φ = 166664962.

The previous prime is 166664929. The next prime is 166665011. The reversal of 166664963 is 369466661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166664963 - 2⁶ = 166664899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166664063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83332481 + 83332482.

It is an arithmetic number, because the mean of its divisors is an integer number (83332482).

Almost surely, 2^166664963 is an apocalyptic number.

166664963 is a deficient number, since it is larger than the sum of its proper divisors (1).

166664963 is an equidigital number, since it uses as much as digits as its factorization.

166664963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 47.

The square root of 166664963 is about 12909.8785044632. The cubic root of 166664963 is about 550.3193330149.

The spelling of 166664963 in words is "one hundred sixty-six million, six hundred sixty-four thousand, nine hundred sixty-three".