12366639 has 12 divisors (see below), whose sum is σ = 18064800. Its totient is φ = 8151264.

The previous prime is 12366637. The next prime is 12366643. The reversal of 12366639 is 93666321.

It is not a de Polignac number, because 12366639 - 2¹ = 12366637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12366631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6919 + ... + 8520.

It is an arithmetic number, because the mean of its divisors is an integer number (1505400).

Almost surely, 2^12366639 is an apocalyptic number.

12366639 is a deficient number, since it is larger than the sum of its proper divisors (5698161).

12366639 is a wasteful number, since it uses less digits than its factorization.

12366639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15534 (or 15531 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 12366639 is about 3516.6232382784. The cubic root of 12366639 is about 231.2511464272.

It can be divided in two parts, 1236 and 6639, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 12366639 in words is "twelve million, three hundred sixty-six thousand, six hundred thirty-nine".