10166561503 has 20 divisors (see below), whose sum is σ = 11875567760. Its totient is φ = 8702969184.

The previous prime is 10166561491. The next prime is 10166561539. The reversal of 10166561503 is 30516566101.

It is not a de Polignac number, because 10166561503 - 2⁹ = 10166560991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10166561203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2247478 + ... + 2251996.

It is an arithmetic number, because the mean of its divisors is an integer number (593778388).

Almost surely, 2^10166561503 is an apocalyptic number.

10166561503 is a deficient number, since it is larger than the sum of its proper divisors (1709006257).

10166561503 is an frugal number, since it uses more digits than its factorization.

10166561503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5484 (or 5463 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The spelling of 10166561503 in words is "ten billion, one hundred sixty-six million, five hundred sixty-one thousand, five hundred three".