13166805243 has 16 divisors (see below), whose sum is σ = 18746956800. Its totient is φ = 8201790240.

The previous prime is 13166805229. The next prime is 13166805251. The reversal of 13166805243 is 34250866131.

It is not a de Polignac number, because 13166805243 - 2²⁵ = 13133250811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13166805263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2438313 + ... + 2443706.

It is an arithmetic number, because the mean of its divisors is an integer number (1171684800).

Almost surely, 2^13166805243 is an apocalyptic number.

13166805243 is a deficient number, since it is larger than the sum of its proper divisors (5580151557).

13166805243 is a wasteful number, since it uses less digits than its factorization.

13166805243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882082.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 13166805243 in words is "thirteen billion, one hundred sixty-six million, eight hundred five thousand, two hundred forty-three".