668419983 has 24 divisors (see below), whose sum is σ = 1203735936. Its totient is φ = 347230800.

The previous prime is 668419967. The next prime is 668419987. The reversal of 668419983 is 389914866.

It is not a de Polignac number, because 668419983 - 2⁴ = 668419967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668419987) 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 in 23 ways as a sum of consecutive naturals, for example, 481573 + ... + 482958.

It is an arithmetic number, because the mean of its divisors is an integer number (50155664).

Almost surely, 2^668419983 is an apocalyptic number.

668419983 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

668419983 is a deficient number, since it is larger than the sum of its proper divisors (535315953).

668419983 is a wasteful number, since it uses less digits than its factorization.

668419983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964555 (or 964552 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 668419983 is about 25853.8195050557. The cubic root of 668419983 is about 874.3456257918.

The spelling of 668419983 in words is "six hundred sixty-eight million, four hundred nineteen thousand, nine hundred eighty-three".