10666261 has 4 divisors (see below), whose sum is σ = 10717024. Its totient is φ = 10615500.

The previous prime is 10666241. The next prime is 10666297. The reversal of 10666261 is 16266601.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10666261 is a prime.

It is a super-2 number, since 2×10666261² = 227538247440242, 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 (10666241) 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, 25065 + ... + 25486.

It is an arithmetic number, because the mean of its divisors is an integer number (2679256).

Almost surely, 2^10666261 is an apocalyptic number.

It is an amenable number.

10666261 is a deficient number, since it is larger than the sum of its proper divisors (50763).

10666261 is an equidigital number, since it uses as much as digits as its factorization.

10666261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50762.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 10666261 is about 3265.9242183492. The cubic root of 10666261 is about 220.1256926371.

The spelling of 10666261 in words is "ten million, six hundred sixty-six thousand, two hundred sixty-one".