10666566 has 20 divisors (see below), whose sum is σ = 23901372. Its totient is φ = 3555468.

The previous prime is 10666559. The next prime is 10666567. The reversal of 10666566 is 66566601.

It is a super-2 number, since 2×10666566² = 227551260464712, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10666566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10666567) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 32760 + ... + 33083.

Almost surely, 2^10666566 is an apocalyptic number.

10666566 is an abundant number, since it is smaller than the sum of its proper divisors (13234806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10666566 is an equidigital number, since it uses as much as digits as its factorization.

10666566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65857 (or 65848 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 10666566 is about 3265.9709123016. The cubic root of 10666566 is about 220.1277907699.

It can be divided in two parts, 1066656 and 6, that multiplied together give a palindrome (6399936).

The spelling of 10666566 in words is "ten million, six hundred sixty-six thousand, five hundred sixty-six".