22061664 has 36 divisors (see below), whose sum is σ = 62738676. Its totient is φ = 7353792.

The previous prime is 22061647. The next prime is 22061671. The reversal of 22061664 is 46616022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38014 + ... + 38589.

It is an arithmetic number, because the mean of its divisors is an integer number (1742741).

Almost surely, 2^22061664 is an apocalyptic number.

22061664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22061664 is an abundant number, since it is smaller than the sum of its proper divisors (40677012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22061664 is a wasteful number, since it uses less digits than its factorization.

22061664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76619 (or 76608 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 22061664 is about 4696.9845645904. The cubic root of 22061664 is about 280.4654842333.

Adding to 22061664 its reverse (46616022), we get a palindrome (68677686).

The spelling of 22061664 in words is "twenty-two million, sixty-one thousand, six hundred sixty-four".