10166561203 has 2 divisors, whose sum is σ = 10166561204. Its totient is φ = 10166561202.

The previous prime is 10166561191. The next prime is 10166561243. The reversal of 10166561203 is 30216566101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10166561203 is a prime.

It is not a weakly prime, because it can be changed into another prime (10166561243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5083280601 + 5083280602.

It is an arithmetic number, because the mean of its divisors is an integer number (5083280602).

Almost surely, 2^10166561203 is an apocalyptic number.

10166561203 is a deficient number, since it is larger than the sum of its proper divisors (1).

10166561203 is an equidigital number, since it uses as much as digits as its factorization.

10166561203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 10166561203 in words is "ten billion, one hundred sixty-six million, five hundred sixty-one thousand, two hundred three".