22665637 has 2 divisors, whose sum is σ = 22665638. Its totient is φ = 22665636.

The previous prime is 22665611. The next prime is 22665647. The reversal of 22665637 is 73656622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22572001 + 93636 = 4751^2 + 306^2 .

It is a cyclic number.

It is not a de Polignac number, because 22665637 - 2¹⁹ = 22141349 is a prime.

It is a super-2 number, since 2×22665637² = 1027462201231538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22665596 and 22665605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22665647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11332818 + 11332819.

It is an arithmetic number, because the mean of its divisors is an integer number (11332819).

Almost surely, 2^22665637 is an apocalyptic number.

It is an amenable number.

22665637 is a deficient number, since it is larger than the sum of its proper divisors (1).

22665637 is an equidigital number, since it uses as much as digits as its factorization.

22665637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 37.

The square root of 22665637 is about 4760.8441478377. The cubic root of 22665637 is about 283.0018729040.

The spelling of 22665637 in words is "twenty-two million, six hundred sixty-five thousand, six hundred thirty-seven".