22660621 has 2 divisors, whose sum is σ = 22660622. Its totient is φ = 22660620.

The previous prime is 22660619. The next prime is 22660633. The reversal of 22660621 is 12606622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22458121 + 202500 = 4739^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 22660621 - 2¹ = 22660619 is a prime.

Together with 22660619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22660601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11330310 + 11330311.

It is an arithmetic number, because the mean of its divisors is an integer number (11330311).

Almost surely, 2^22660621 is an apocalyptic number.

It is an amenable number.

22660621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22660621 is an equidigital number, since it uses as much as digits as its factorization.

22660621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 22660621 is about 4760.3173213558. The cubic root of 22660621 is about 282.9809948655.

The spelling of 22660621 in words is "twenty-two million, six hundred sixty thousand, six hundred twenty-one".