10505566 has 4 divisors (see below), whose sum is σ = 15758352. Its totient is φ = 5252782.

The previous prime is 10505563. The next prime is 10505597. The reversal of 10505566 is 66550501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66550501 = 71 ⋅937331.

It is a super-2 number, since 2×10505566² = 220733833960712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10505563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626390 + ... + 2626393.

It is an arithmetic number, because the mean of its divisors is an integer number (3939588).

Almost surely, 2^10505566 is an apocalyptic number.

10505566 is a deficient number, since it is larger than the sum of its proper divisors (5252786).

10505566 is an equidigital number, since it uses as much as digits as its factorization.

10505566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5252785.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 10505566 is about 3241.2290878616. The cubic root of 10505566 is about 219.0146428635.

The spelling of 10505566 in words is "ten million, five hundred five thousand, five hundred sixty-six".