12990766 has 4 divisors (see below), whose sum is σ = 19486152. Its totient is φ = 6495382.

The previous prime is 12990749. The next prime is 12990787. The reversal of 12990766 is 66709921.

12990766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66709921 = 17 ⋅3924113.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3247690 + ... + 3247693.

It is an arithmetic number, because the mean of its divisors is an integer number (4871538).

Almost surely, 2^12990766 is an apocalyptic number.

12990766 is a deficient number, since it is larger than the sum of its proper divisors (6495386).

12990766 is an equidigital number, since it uses as much as digits as its factorization.

12990766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6495385.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 12990766 is about 3604.2705225884. The cubic root of 12990766 is about 235.0777832148.

The spelling of 12990766 in words is "twelve million, nine hundred ninety thousand, seven hundred sixty-six".