12666622 has 16 divisors (see below), whose sum is σ = 19649952. Its totient is φ = 6119680.

The previous prime is 12666607. The next prime is 12666671. The reversal of 12666622 is 22666621.

It is a congruent number.

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, 8583 + ... + 9949.

It is an arithmetic number, because the mean of its divisors is an integer number (1228122).

Almost surely, 2^12666622 is an apocalyptic number.

12666622 is a deficient number, since it is larger than the sum of its proper divisors (6983330).

12666622 is a wasteful number, since it uses less digits than its factorization.

12666622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523.

The product of its digits is 10368, while the sum is 31.

The square root of 12666622 is about 3559.0198088800. The cubic root of 12666622 is about 233.1060812368.

Subtracting 12666622 from its reverse (22666621), we obtain a palindrome (9999999).

The spelling of 12666622 in words is "twelve million, six hundred sixty-six thousand, six hundred twenty-two".