10666647 has 10 divisors (see below), whose sum is σ = 15934248. Its totient is φ = 7111044.

The previous prime is 10666609. The next prime is 10666673. The reversal of 10666647 is 74666601.

It is not a de Polignac number, because 10666647 - 2⁶ = 10666583 is a prime.

It is a super-2 number, since 2×10666647² = 227554716445218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10666147) 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 9 ways as a sum of consecutive naturals, for example, 65763 + ... + 65924.

Almost surely, 2^10666647 is an apocalyptic number.

10666647 is a deficient number, since it is larger than the sum of its proper divisors (5267601).

10666647 is an equidigital number, since it uses as much as digits as its factorization.

10666647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131699 (or 131690 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 10666647 is about 3265.9833128784. The cubic root of 10666647 is about 220.1283479723.

The spelling of 10666647 in words is "ten million, six hundred sixty-six thousand, six hundred forty-seven".