166864963 has 2 divisors, whose sum is σ = 166864964. Its totient is φ = 166864962.

The previous prime is 166864903. The next prime is 166864987. The reversal of 166864963 is 369468661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166864963 - 2¹⁷ = 166733891 is a prime.

It is not a weakly prime, because it can be changed into another prime (166864903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83432481 + 83432482.

It is an arithmetic number, because the mean of its divisors is an integer number (83432482).

Almost surely, 2^166864963 is an apocalyptic number.

166864963 is a deficient number, since it is larger than the sum of its proper divisors (1).

166864963 is an equidigital number, since it uses as much as digits as its factorization.

166864963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 49.

The square root of 166864963 is about 12917.6221883131. The cubic root of 166864963 is about 550.5393750041.

The spelling of 166864963 in words is "one hundred sixty-six million, eight hundred sixty-four thousand, nine hundred sixty-three".