10256866 has 4 divisors (see below), whose sum is σ = 15385302. Its totient is φ = 5128432.

The previous prime is 10256861. The next prime is 10256947. The reversal of 10256866 is 66865201.

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

It can be written as a sum of positive squares in only one way, i.e., 10208025 + 48841 = 3195^2 + 221^2 .

It is not an unprimeable number, because it can be changed into a prime (10256861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2564215 + ... + 2564218.

Almost surely, 2^10256866 is an apocalyptic number.

10256866 is a deficient number, since it is larger than the sum of its proper divisors (5128436).

10256866 is an equidigital number, since it uses as much as digits as its factorization.

10256866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128435.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 10256866 is about 3202.6342282565. The cubic root of 10256866 is about 217.2725662428.

The spelling of 10256866 in words is "ten million, two hundred fifty-six thousand, eight hundred sixty-six".