2321666 has 16 divisors (see below), whose sum is σ = 3725568. Its totient is φ = 1082400.

The previous prime is 2321647. The next prime is 2321677. The reversal of 2321666 is 6661232.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1271 + ... + 2501.

It is an arithmetic number, because the mean of its divisors is an integer number (232848).

2^2321666 is an apocalyptic number.

2321666 is a deficient number, since it is larger than the sum of its proper divisors (1403902).

2321666 is a wasteful number, since it uses less digits than its factorization.

2321666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297.

The product of its digits is 2592, while the sum is 26.

The square root of 2321666 is about 1523.7014143197. The cubic root of 2321666 is about 132.4137993972.

Adding to 2321666 its reverse (6661232), we get a palindrome (8982898).

The spelling of 2321666 in words is "two million, three hundred twenty-one thousand, six hundred sixty-six".