660022206440 has 16 divisors (see below), whose sum is σ = 1485049964580. Its totient is φ = 264008882560.

The previous prime is 660022206439. The next prime is 660022206451. The reversal of 660022206440 is 44602220066.

It can be written as a sum of positive squares in 2 ways, for example, as 638493687364 + 21528519076 = 799058^2 + 146726^2 .

It is a junction number, because it is equal to n+sod(n) for n = 660022206397 and 660022206406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8250277541 + ... + 8250277620.

Almost surely, 2^660022206440 is an apocalyptic number.

It is an amenable number.

660022206440 is an abundant number, since it is smaller than the sum of its proper divisors (825027758140).

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

660022206440 is a wasteful number, since it uses less digits than its factorization.

660022206440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16500555172 (or 16500555168 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 660022206440 in words is "six hundred sixty billion, twenty-two million, two hundred six thousand, four hundred forty".