12166990 has 16 divisors (see below), whose sum is σ = 23891760. Its totient is φ = 4424320.

The previous prime is 12166967. The next prime is 12166991. The reversal of 12166990 is 9966121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55195 + ... + 55414.

It is an arithmetic number, because the mean of its divisors is an integer number (1493235).

Almost surely, 2^12166990 is an apocalyptic number.

12166990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12166990 is a deficient number, since it is larger than the sum of its proper divisors (11724770).

12166990 is a wasteful number, since it uses less digits than its factorization.

12166990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110627.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 12166990 is about 3488.1212708276. The cubic root of 12166990 is about 229.9999369880. Note that the first 4 decimals are identical.

The spelling of 12166990 in words is "twelve million, one hundred sixty-six thousand, nine hundred ninety".