2666909243 has 2 divisors, whose sum is σ = 2666909244. Its totient is φ = 2666909242.

The previous prime is 2666909239. The next prime is 2666909257. The reversal of 2666909243 is 3429096662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2666909243 - 2² = 2666909239 is a prime.

It is a super-2 number, since 2×2666909243² = 14224809820797666098, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2666909263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333454621 + 1333454622.

It is an arithmetic number, because the mean of its divisors is an integer number (1333454622).

Almost surely, 2^2666909243 is an apocalyptic number.

2666909243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666909243 is an equidigital number, since it uses as much as digits as its factorization.

2666909243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 47.

The square root of 2666909243 is about 51642.1266312688. The cubic root of 2666909243 is about 1386.7645956852.

The spelling of 2666909243 in words is "two billion, six hundred sixty-six million, nine hundred nine thousand, two hundred forty-three".