22040666 has 4 divisors (see below), whose sum is σ = 33061002. Its totient is φ = 11020332.

The previous prime is 22040663. The next prime is 22040699. The reversal of 22040666 is 66604022.

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., 15171025 + 6869641 = 3895^2 + 2621^2 .

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (22040663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510165 + ... + 5510168.

Almost surely, 2^22040666 is an apocalyptic number.

22040666 is a deficient number, since it is larger than the sum of its proper divisors (11020336).

22040666 is a wasteful number, since it uses less digits than its factorization.

22040666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11020335.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 22040666 is about 4694.7487685711. The cubic root of 22040666 is about 280.3764748752.

Adding to 22040666 its reverse (66604022), we get a palindrome (88644688).

The spelling of 22040666 in words is "twenty-two million, forty thousand, six hundred sixty-six".