22660816 has 20 divisors (see below), whose sum is σ = 44072452. Its totient is φ = 11287296.

The previous prime is 22660811. The next prime is 22660837. The reversal of 22660816 is 61806622.

It can be written as a sum of positive squares in 2 ways, for example, as 1537600 + 21123216 = 1240^2 + 4596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22660811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1876 + ... + 6988.

Almost surely, 2^22660816 is an apocalyptic number.

It is an amenable number.

22660816 is a deficient number, since it is larger than the sum of its proper divisors (21411636).

22660816 is a wasteful number, since it uses less digits than its factorization.

22660816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5398 (or 5392 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 22660816 is about 4760.3378031396. The cubic root of 22660816 is about 282.9818065693.

The spelling of 22660816 in words is "twenty-two million, six hundred sixty thousand, eight hundred sixteen".