668414385 has 48 divisors (see below), whose sum is σ = 1212681600. Its totient is φ = 339939072.

The previous prime is 668414371. The next prime is 668414387. The reversal of 668414385 is 583414866.

It is not a de Polignac number, because 668414385 - 2¹¹ = 668412337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 668414385.

It is not an unprimeable number, because it can be changed into a prime (668414387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 422526 + ... + 424104.

It is an arithmetic number, because the mean of its divisors is an integer number (25264200).

Almost surely, 2^668414385 is an apocalyptic number.

It is an amenable number.

668414385 is a deficient number, since it is larger than the sum of its proper divisors (544267215).

668414385 is a wasteful number, since it uses less digits than its factorization.

668414385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022 (or 2019 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 668414385 is about 25853.7112422956. The cubic root of 668414385 is about 874.3431849110.

The spelling of 668414385 in words is "six hundred sixty-eight million, four hundred fourteen thousand, three hundred eighty-five".