22779664 has 30 divisors (see below), whose sum is σ = 45006110. Its totient is φ = 11169408.

The previous prime is 22779661. The next prime is 22779667. The reversal of 22779664 is 46697722.

It is an interprime number because it is at equal distance from previous prime (22779661) and next prime (22779667).

It can be written as a sum of positive squares in only one way, i.e., 22278400 + 501264 = 4720^2 + 708^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22779664.

It is not an unprimeable number, because it can be changed into a prime (22779661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55492 + ... + 55900.

Almost surely, 2^22779664 is an apocalyptic number.

It is an amenable number.

22779664 is a deficient number, since it is larger than the sum of its proper divisors (22226446).

22779664 is an equidigital number, since it uses as much as digits as its factorization.

22779664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 470 counting only the distinct ones).

The product of its digits is 254016, while the sum is 43.

The square root of 22779664 is about 4772.8046262130. The cubic root of 22779664 is about 283.4756575229.

The spelling of 22779664 in words is "twenty-two million, seven hundred seventy-nine thousand, six hundred sixty-four".