10220866 has 4 divisors (see below), whose sum is σ = 15331302. Its totient is φ = 5110432.

The previous prime is 10220863. The next prime is 10220911. The reversal of 10220866 is 66802201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66802201 = 751 ⋅88951.

It can be written as a sum of positive squares in only one way, i.e., 5688225 + 4532641 = 2385^2 + 2129^2 .

It is a super-2 number, since 2×10220866² = 208932203579912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10220866.

It is not an unprimeable number, because it can be changed into a prime (10220863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2555215 + ... + 2555218.

Almost surely, 2^10220866 is an apocalyptic number.

10220866 is a deficient number, since it is larger than the sum of its proper divisors (5110436).

10220866 is an equidigital number, since it uses as much as digits as its factorization.

10220866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110435.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 10220866 is about 3197.0089145950. The cubic root of 10220866 is about 217.0180706564.

The spelling of 10220866 in words is "ten million, two hundred twenty thousand, eight hundred sixty-six".