2666219399 has 2 divisors, whose sum is σ = 2666219400. Its totient is φ = 2666219398.

The previous prime is 2666219377. The next prime is 2666219447. The reversal of 2666219399 is 9939126662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2666219399 - 2¹² = 2666215303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2666219399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666219359) 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, 1333109699 + 1333109700.

It is an arithmetic number, because the mean of its divisors is an integer number (1333109700).

Almost surely, 2^2666219399 is an apocalyptic number.

2666219399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666219399 is an equidigital number, since it uses as much as digits as its factorization.

2666219399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 53.

The square root of 2666219399 is about 51635.4471172663. The cubic root of 2666219399 is about 1386.6450148465.

The spelling of 2666219399 in words is "two billion, six hundred sixty-six million, two hundred nineteen thousand, three hundred ninety-nine".