2666720299 has 2 divisors, whose sum is σ = 2666720300. Its totient is φ = 2666720298.

The previous prime is 2666720269. The next prime is 2666720321. The reversal of 2666720299 is 9920276662.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2666720299 - 2⁵ = 2666720267 is a prime.

It is a super-2 number, since 2×2666720299² = 14222794306197298802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2666720269) 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, 1333360149 + 1333360150.

It is an arithmetic number, because the mean of its divisors is an integer number (1333360150).

Almost surely, 2^2666720299 is an apocalyptic number.

2666720299 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666720299 is an equidigital number, since it uses as much as digits as its factorization.

2666720299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 2666720299 is about 51640.2972396558. The cubic root of 2666720299 is about 1386.7318452847.

The spelling of 2666720299 in words is "two billion, six hundred sixty-six million, seven hundred twenty thousand, two hundred ninety-nine".