12805166693 has 4 divisors (see below), whose sum is σ = 13969272768. Its totient is φ = 11641060620.

The previous prime is 12805166687. The next prime is 12805166713. The reversal of 12805166693 is 39666150821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12805166693 - 2⁴ = 12805166677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12805166623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582053021 + ... + 582053042.

It is an arithmetic number, because the mean of its divisors is an integer number (3492318192).

Almost surely, 2^12805166693 is an apocalyptic number.

It is an amenable number.

12805166693 is a deficient number, since it is larger than the sum of its proper divisors (1164106075).

12805166693 is a wasteful number, since it uses less digits than its factorization.

12805166693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164106074.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 12805166693 in words is "twelve billion, eight hundred five million, one hundred sixty-six thousand, six hundred ninety-three".