662666419 has 2 divisors, whose sum is σ = 662666420. Its totient is φ = 662666418.

The previous prime is 662666393. The next prime is 662666429. The reversal of 662666419 is 914666266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 662666419 - 2¹⁵ = 662633651 is a prime.

It is a super-2 number, since 2×662666419² = 878253565740567122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (662666429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331333209 + 331333210.

It is an arithmetic number, because the mean of its divisors is an integer number (331333210).

Almost surely, 2^662666419 is an apocalyptic number.

662666419 is a deficient number, since it is larger than the sum of its proper divisors (1).

662666419 is an equidigital number, since it uses as much as digits as its factorization.

662666419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 46.

The square root of 662666419 is about 25742.3079579124. The cubic root of 662666419 is about 871.8296891771.

The spelling of 662666419 in words is "six hundred sixty-two million, six hundred sixty-six thousand, four hundred nineteen".