12662421265 has 16 divisors (see below), whose sum is σ = 17075213568. Its totient is φ = 8944157376.

The previous prime is 12662421197. The next prime is 12662421269. The reversal of 12662421265 is 56212426621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12662421265 - 2⁷ = 12662421137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12662421269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4233429 + ... + 4236418.

It is an arithmetic number, because the mean of its divisors is an integer number (1067200848).

Almost surely, 2^12662421265 is an apocalyptic number.

It is an amenable number.

12662421265 is a deficient number, since it is larger than the sum of its proper divisors (4412792303).

12662421265 is a wasteful number, since it uses less digits than its factorization.

12662421265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8469888.

The product of its digits is 69120, while the sum is 37.

Adding to 12662421265 its reverse (56212426621), we get a palindrome (68874847886).

The spelling of 12662421265 in words is "twelve billion, six hundred sixty-two million, four hundred twenty-one thousand, two hundred sixty-five".