12251666 has 12 divisors (see below), whose sum is σ = 21378078. Its totient is φ = 5250672.

The previous prime is 12251653. The next prime is 12251671. The reversal of 12251666 is 66615221.

12251666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12103441 + 148225 = 3479^2 + 385^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62411 + ... + 62606.

Almost surely, 2^12251666 is an apocalyptic number.

12251666 is a deficient number, since it is larger than the sum of its proper divisors (9126412).

12251666 is a wasteful number, since it uses less digits than its factorization.

12251666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125033 (or 125026 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 12251666 is about 3500.2379919086. The cubic root of 12251666 is about 230.5322644515.

Adding to 12251666 its reverse (66615221), we get a palindrome (78866887).

The spelling of 12251666 in words is "twelve million, two hundred fifty-one thousand, six hundred sixty-six".