166440382963 has 2 divisors, whose sum is σ = 166440382964. Its totient is φ = 166440382962.

The previous prime is 166440382939. The next prime is 166440383023. The reversal of 166440382963 is 369283044661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166440382963 - 2⁵ = 166440382931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166440382963.

It is not a weakly prime, because it can be changed into another prime (166440382363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83220191481 + 83220191482.

It is an arithmetic number, because the mean of its divisors is an integer number (83220191482).

Almost surely, 2^166440382963 is an apocalyptic number.

166440382963 is a deficient number, since it is larger than the sum of its proper divisors (1).

166440382963 is an equidigital number, since it uses as much as digits as its factorization.

166440382963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 52.

The spelling of 166440382963 in words is "one hundred sixty-six billion, four hundred forty million, three hundred eighty-two thousand, nine hundred sixty-three".