10666557 has 24 divisors (see below), whose sum is σ = 16936608. Its totient is φ = 6415200.

The previous prime is 10666547. The next prime is 10666559. The reversal of 10666557 is 75566601.

It is a happy number.

It is not a de Polignac number, because 10666557 - 2⁶ = 10666493 is a prime.

It is a super-2 number, since 2×10666557² = 227550876468498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10666559) 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 in 23 ways as a sum of consecutive naturals, for example, 15807 + ... + 16467.

It is an arithmetic number, because the mean of its divisors is an integer number (705692).

Almost surely, 2^10666557 is an apocalyptic number.

It is an amenable number.

10666557 is a deficient number, since it is larger than the sum of its proper divisors (6270051).

10666557 is a wasteful number, since it uses less digits than its factorization.

10666557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 10666557 is about 3265.9695344568. The cubic root of 10666557 is about 220.1277288584.

The spelling of 10666557 in words is "ten million, six hundred sixty-six thousand, five hundred fifty-seven".