10665217 has 4 divisors (see below), whose sum is σ = 10712020. Its totient is φ = 10618416.

The previous prime is 10665199. The next prime is 10665229. The reversal of 10665217 is 71256601.

10665217 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4309776 + 6355441 = 2076^2 + 2521^2 .

It is a cyclic number.

It is not a de Polignac number, because 10665217 - 2⁷ = 10665089 is a prime.

It is a super-2 number, since 2×10665217² = 227493707314178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10660217) 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, 23058 + ... + 23515.

It is an arithmetic number, because the mean of its divisors is an integer number (2678005).

Almost surely, 2^10665217 is an apocalyptic number.

It is an amenable number.

10665217 is a deficient number, since it is larger than the sum of its proper divisors (46803).

10665217 is an equidigital number, since it uses as much as digits as its factorization.

10665217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46802.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 10665217 is about 3265.7643821929. The cubic root of 10665217 is about 220.1185105289.

It can be divided in two parts, 1066521 and 7, that multiplied together give a palindrome (7465647).

The spelling of 10665217 in words is "ten million, six hundred sixty-five thousand, two hundred seventeen".