10821666 has 32 divisors (see below), whose sum is σ = 22675968. Its totient is φ = 3438720.

The previous prime is 10821647. The next prime is 10821677. The reversal of 10821666 is 66612801.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13180 + ... + 13976.

It is an arithmetic number, because the mean of its divisors is an integer number (708624).

Almost surely, 2^10821666 is an apocalyptic number.

10821666 is an abundant number, since it is smaller than the sum of its proper divisors (11854302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10821666 is a wasteful number, since it uses less digits than its factorization.

10821666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 10821666 is about 3289.6300703879. The cubic root of 10821666 is about 221.1896027168.

The spelling of 10821666 in words is "ten million, eight hundred twenty-one thousand, six hundred sixty-six".