668774419 has 2 divisors, whose sum is σ = 668774420. Its totient is φ = 668774418.

The previous prime is 668774387. The next prime is 668774437. The reversal of 668774419 is 914477866.

668774419 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 a cyclic number.

It is not a de Polignac number, because 668774419 - 2⁵ = 668774387 is a prime.

It is a super-2 number, since 2×668774419² = 894518447017575122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (668774459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334387209 + 334387210.

It is an arithmetic number, because the mean of its divisors is an integer number (334387210).

Almost surely, 2^668774419 is an apocalyptic number.

668774419 is a deficient number, since it is larger than the sum of its proper divisors (1).

668774419 is an equidigital number, since it uses as much as digits as its factorization.

668774419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 52.

The square root of 668774419 is about 25860.6732124282. The cubic root of 668774419 is about 874.5001418219.

The spelling of 668774419 in words is "six hundred sixty-eight million, seven hundred seventy-four thousand, four hundred nineteen".