2291666 has 16 divisors (see below), whose sum is σ = 3897600. Its totient is φ = 1001808.

The previous prime is 2291659. The next prime is 2291677. The reversal of 2291666 is 6661922.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1826 + ... + 2813.

It is an arithmetic number, because the mean of its divisors is an integer number (243600).

2^2291666 is an apocalyptic number.

2291666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2291666 is a deficient number, since it is larger than the sum of its proper divisors (1605934).

2291666 is a wasteful number, since it uses less digits than its factorization.

2291666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4673.

The product of its digits is 7776, while the sum is 32.

The square root of 2291666 is about 1513.8249568560. The cubic root of 2291666 is about 131.8409854398.

The spelling of 2291666 in words is "two million, two hundred ninety-one thousand, six hundred sixty-six".