22101666 has 32 divisors (see below), whose sum is σ = 48843648. Its totient is φ = 6631680.

The previous prime is 22101641. The next prime is 22101671. The reversal of 22101666 is 66610122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2365 + ... + 7056.

It is an arithmetic number, because the mean of its divisors is an integer number (1526364).

Almost surely, 2^22101666 is an apocalyptic number.

22101666 is an abundant number, since it is smaller than the sum of its proper divisors (26741982).

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

22101666 is a wasteful number, since it uses less digits than its factorization.

22101666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9466.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 22101666 is about 4701.2409000178. The cubic root of 22101666 is about 280.6348943359.

Adding to 22101666 its reverse (66610122), we get a palindrome (88711788).

The spelling of 22101666 in words is "twenty-two million, one hundred one thousand, six hundred sixty-six".