22036661 has 2 divisors, whose sum is σ = 22036662. Its totient is φ = 22036660.

The previous prime is 22036657. The next prime is 22036697. The reversal of 22036661 is 16663022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22033636 + 3025 = 4694^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 22036661 - 2² = 22036657 is a prime.

It is a super-2 number, since 2×22036661² = 971228856057842, 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 22036661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22036961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11018330 + 11018331.

It is an arithmetic number, because the mean of its divisors is an integer number (11018331).

Almost surely, 2^22036661 is an apocalyptic number.

It is an amenable number.

22036661 is a deficient number, since it is larger than the sum of its proper divisors (1).

22036661 is an equidigital number, since it uses as much as digits as its factorization.

22036661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 22036661 is about 4694.3222087965. The cubic root of 22036661 is about 280.3594914833.

Adding to 22036661 its reverse (16663022), we get a palindrome (38699683).

The spelling of 22036661 in words is "twenty-two million, thirty-six thousand, six hundred sixty-one".