10662221 has 8 divisors (see below), whose sum is σ = 10824000. Its totient is φ = 10501920.

The previous prime is 10662209. The next prime is 10662241. The reversal of 10662221 is 12226601.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10662221 - 2¹⁴ = 10645837 is a prime.

It is a super-2 number, since 2×10662221² = 227365913305682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10662193 and 10662202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10662241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25865 + ... + 26273.

It is an arithmetic number, because the mean of its divisors is an integer number (1353000).

Almost surely, 2^10662221 is an apocalyptic number.

It is an amenable number.

10662221 is a deficient number, since it is larger than the sum of its proper divisors (161779).

10662221 is a wasteful number, since it uses less digits than its factorization.

10662221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 10662221 is about 3265.3056518495. The cubic root of 10662221 is about 220.0978972019.

Adding to 10662221 its reverse (12226601), we get a palindrome (22888822).

The spelling of 10662221 in words is "ten million, six hundred sixty-two thousand, two hundred twenty-one".