12661803 has 48 divisors (see below), whose sum is σ = 23142912. Its totient is φ = 6534000.

The previous prime is 12661801. The next prime is 12661819. The reversal of 12661803 is 30816621.

It is not a de Polignac number, because 12661803 - 2¹ = 12661801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12661801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83778 + ... + 83928.

It is an arithmetic number, because the mean of its divisors is an integer number (482144).

Almost surely, 2^12661803 is an apocalyptic number.

12661803 is a deficient number, since it is larger than the sum of its proper divisors (10481109).

12661803 is a wasteful number, since it uses less digits than its factorization.

12661803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12661803 is about 3558.3427322280. The cubic root of 12661803 is about 233.0765158512.

The spelling of 12661803 in words is "twelve million, six hundred sixty-one thousand, eight hundred three".