2660222440 has 16 divisors (see below), whose sum is σ = 5985500580. Its totient is φ = 1064088960.

The previous prime is 2660222423. The next prime is 2660222443. The reversal of 2660222440 is 442220662.

It can be written as a sum of positive squares in 2 ways, for example, as 2229161796 + 431060644 = 47214^2 + 20762^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2660222399 and 2660222408.

It is not an unprimeable number, because it can be changed into a prime (2660222443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33252741 + ... + 33252820.

Almost surely, 2^2660222440 is an apocalyptic number.

2660222440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2660222440 is an abundant number, since it is smaller than the sum of its proper divisors (3325278140).

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

2660222440 is a wasteful number, since it uses less digits than its factorization.

2660222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66505572 (or 66505568 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 2660222440 is about 51577.3442511341. The cubic root of 2660222440 is about 1385.6046033770.

It can be divided in two parts, 2660222 and 440, that added together give a palindrome (2660662).

The spelling of 2660222440 in words is "two billion, six hundred sixty million, two hundred twenty-two thousand, four hundred forty".