22150721066 has 4 divisors (see below), whose sum is σ = 33226081602. Its totient is φ = 11075360532.

The previous prime is 22150721051. The next prime is 22150721071. The reversal of 22150721066 is 66012705122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20469311041 + 1681410025 = 143071^2 + 41005^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5537680265 + ... + 5537680268.

Almost surely, 2^22150721066 is an apocalyptic number.

22150721066 is a deficient number, since it is larger than the sum of its proper divisors (11075360536).

22150721066 is a wasteful number, since it uses less digits than its factorization.

22150721066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11075360535.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 22150721066 in words is "twenty-two billion, one hundred fifty million, seven hundred twenty-one thousand, sixty-six".