1246666689 has 24 divisors (see below), whose sum is σ = 1857997440. Its totient is φ = 805083552.

The previous prime is 1246666679. The next prime is 1246666691. The reversal of 1246666689 is 9866666421.

1246666689 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1246666689 - 2⁹ = 1246666177 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1246666679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21142 + ... + 54224.

It is an arithmetic number, because the mean of its divisors is an integer number (77416560).

Almost surely, 2^1246666689 is an apocalyptic number.

It is an amenable number.

1246666689 is a deficient number, since it is larger than the sum of its proper divisors (611330751).

1246666689 is a wasteful number, since it uses less digits than its factorization.

1246666689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33221 (or 33218 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 1246666689 is about 35308.1674545706. The cubic root of 1246666689 is about 1076.2589725160.

The spelling of 1246666689 in words is "one billion, two hundred forty-six million, six hundred sixty-six thousand, six hundred eighty-nine".