12166722 has 12 divisors (see below), whose sum is σ = 26361270. Its totient is φ = 4055568.

The previous prime is 12166703. The next prime is 12166729. The reversal of 12166722 is 22766121.

It can be written as a sum of positive squares in only one way, i.e., 9979281 + 2187441 = 3159^2 + 1479^2 .

It is not an unprimeable number, because it can be changed into a prime (12166729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 337947 + ... + 337982.

Almost surely, 2^12166722 is an apocalyptic number.

12166722 is an abundant number, since it is smaller than the sum of its proper divisors (14194548).

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

12166722 is a wasteful number, since it uses less digits than its factorization.

12166722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675937 (or 675934 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12166722 is about 3488.0828545205. The cubic root of 12166722 is about 229.9982482538.

The spelling of 12166722 in words is "twelve million, one hundred sixty-six thousand, seven hundred twenty-two".