10505646166 has 4 divisors (see below), whose sum is σ = 15758469252. Its totient is φ = 5252823082.

The previous prime is 10505646161. The next prime is 10505646181. The reversal of 10505646166 is 66164650501.

10505646166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66164650501 = 179 ⋅369634919.

It is a super-2 number, since 2×10505646166² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10505646161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626411540 + ... + 2626411543.

It is an arithmetic number, because the mean of its divisors is an integer number (3939617313).

Almost surely, 2^10505646166 is an apocalyptic number.

10505646166 is a deficient number, since it is larger than the sum of its proper divisors (5252823086).

10505646166 is an equidigital number, since it uses as much as digits as its factorization.

10505646166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5252823085.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 10505646166 in words is "ten billion, five hundred five million, six hundred forty-six thousand, one hundred sixty-six".