12613666 has 16 divisors (see below), whose sum is σ = 21079800. Its totient is φ = 5620608.

The previous prime is 12613661. The next prime is 12613673. The reversal of 12613666 is 66631621.

It can be written as a sum of positive squares in 4 ways, for example, as 9740641 + 2873025 = 3121^2 + 1695^2 .

It is not an unprimeable number, because it can be changed into a prime (12613661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7611 + ... + 9118.

Almost surely, 2^12613666 is an apocalyptic number.

12613666 is a deficient number, since it is larger than the sum of its proper divisors (8466134).

12613666 is a wasteful number, since it uses less digits than its factorization.

12613666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16773.

The product of its digits is 7776, while the sum is 31.

The square root of 12613666 is about 3551.5723278571. The cubic root of 12613666 is about 232.7807745998.

The spelling of 12613666 in words is "twelve million, six hundred thirteen thousand, six hundred sixty-six".