22665690 has 64 divisors (see below), whose sum is σ = 61009920. Its totient is φ = 5987520.

The previous prime is 22665667. The next prime is 22665701. The reversal of 22665690 is 9656622.

It is a super-2 number, since 2×22665690² = 1027467006352200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33960 + ... + 34620.

It is an arithmetic number, because the mean of its divisors is an integer number (953280).

Almost surely, 2^22665690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22665690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30504960).

22665690 is an abundant number, since it is smaller than the sum of its proper divisors (38344230).

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

22665690 is a wasteful number, since it uses less digits than its factorization.

22665690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 22665690 is about 4760.8497140742. The cubic root of 22665690 is about 283.0020934888.

The spelling of 22665690 in words is "twenty-two million, six hundred sixty-five thousand, six hundred ninety".