13166621203 has 8 divisors (see below), whose sum is σ = 13224854720. Its totient is φ = 13108417920.

The previous prime is 13166621137. The next prime is 13166621213. The reversal of 13166621203 is 30212666131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13166621203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13166621213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1588153 + ... + 1596421.

It is an arithmetic number, because the mean of its divisors is an integer number (1653106840).

Almost surely, 2^13166621203 is an apocalyptic number.

13166621203 is a deficient number, since it is larger than the sum of its proper divisors (58233517).

13166621203 is an equidigital number, since it uses as much as digits as its factorization.

13166621203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15117.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 13166621203 in words is "thirteen billion, one hundred sixty-six million, six hundred twenty-one thousand, two hundred three".