2666720267 has 2 divisors, whose sum is σ = 2666720268. Its totient is φ = 2666720266.

The previous prime is 2666720227. The next prime is 2666720269. The reversal of 2666720267 is 7620276662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2666720267 - 2¹⁰ = 2666719243 is a prime.

It is a super-2 number, since 2×2666720267² = 14222793964857102578, which contains 22 as substring.

Together with 2666720269, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2666720269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333360133 + 1333360134.

It is an arithmetic number, because the mean of its divisors is an integer number (1333360134).

Almost surely, 2^2666720267 is an apocalyptic number.

2666720267 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666720267 is an equidigital number, since it uses as much as digits as its factorization.

2666720267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 44.

The square root of 2666720267 is about 51640.2969298202. The cubic root of 2666720267 is about 1386.7318397379.

The spelling of 2666720267 in words is "two billion, six hundred sixty-six million, seven hundred twenty thousand, two hundred sixty-seven".