10666549 has 4 divisors (see below), whose sum is σ = 11130336. Its totient is φ = 10202764.

The previous prime is 10666547. The next prime is 10666559. The reversal of 10666549 is 94566601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94566601 = 509 ⋅185789.

It is a cyclic number.

It is not a de Polignac number, because 10666549 - 2¹ = 10666547 is a prime.

It is a super-2 number, since 2×10666549² = 227550535138802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10666547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231859 + ... + 231904.

It is an arithmetic number, because the mean of its divisors is an integer number (2782584).

Almost surely, 2^10666549 is an apocalyptic number.

It is an amenable number.

10666549 is a deficient number, since it is larger than the sum of its proper divisors (463787).

10666549 is an equidigital number, since it uses as much as digits as its factorization.

10666549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463786.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 10666549 is about 3265.9683097054. The cubic root of 10666549 is about 220.1276738259.

The spelling of 10666549 in words is "ten million, six hundred sixty-six thousand, five hundred forty-nine".