11621866 has 16 divisors (see below), whose sum is σ = 18167040. Its totient is φ = 5569200.

The previous prime is 11621843. The next prime is 11621873. The reversal of 11621866 is 66812611.

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, 8095 + ... + 9421.

It is an arithmetic number, because the mean of its divisors is an integer number (1135440).

Almost surely, 2^11621866 is an apocalyptic number.

11621866 is a deficient number, since it is larger than the sum of its proper divisors (6545174).

11621866 is a wasteful number, since it uses less digits than its factorization.

11621866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509.

The product of its digits is 3456, while the sum is 31.

The square root of 11621866 is about 3409.0858012083. The cubic root of 11621866 is about 226.5123858814.

The spelling of 11621866 in words is "eleven million, six hundred twenty-one thousand, eight hundred sixty-six".