166440383023 has 2 divisors, whose sum is σ = 166440383024. Its totient is φ = 166440383022.

The previous prime is 166440382963. The next prime is 166440383033. The reversal of 166440383023 is 320383044661.

166440383023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (320383044661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166440383023 - 2¹³ = 166440374831 is a prime.

It is a super-2 number, since 2×166440383023² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166440383033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83220191511 + 83220191512.

It is an arithmetic number, because the mean of its divisors is an integer number (83220191512).

Almost surely, 2^166440383023 is an apocalyptic number.

166440383023 is a deficient number, since it is larger than the sum of its proper divisors (1).

166440383023 is an equidigital number, since it uses as much as digits as its factorization.

166440383023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 166440383023 in words is "one hundred sixty-six billion, four hundred forty million, three hundred eighty-three thousand, twenty-three".