2666659 has 2 divisors, whose sum is σ = 2666660. Its totient is φ = 2666658.

The previous prime is 2666647. The next prime is 2666663. The reversal of 2666659 is 9566662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2666659 - 2²¹ = 569507 is a prime.

It is a super-2 number, since 2×2666659² = 14222140444562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2660659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333329 + 1333330.

It is an arithmetic number, because the mean of its divisors is an integer number (1333330).

2^2666659 is an apocalyptic number.

2666659 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666659 is an equidigital number, since it uses as much as digits as its factorization.

2666659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 40.

The square root of 2666659 is about 1632.9908144261. The cubic root of 2666659 is about 138.6721219758.

The spelling of 2666659 in words is "two million, six hundred sixty-six thousand, six hundred fifty-nine".