2660550440 has 16 divisors (see below), whose sum is σ = 5986238580. Its totient is φ = 1064220160.

The previous prime is 2660550437. The next prime is 2660550443. The reversal of 2660550440 is 440550662.

It is an interprime number because it is at equal distance from previous prime (2660550437) and next prime (2660550443).

It can be written as a sum of positive squares in 2 ways, for example, as 2609370724 + 51179716 = 51082^2 + 7154^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2660550397 and 2660550406.

It is not an unprimeable number, because it can be changed into a prime (2660550443) 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, 33256841 + ... + 33256920.

Almost surely, 2^2660550440 is an apocalyptic number.

2660550440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2660550440 is an abundant number, since it is smaller than the sum of its proper divisors (3325688140).

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

2660550440 is a wasteful number, since it uses less digits than its factorization.

2660550440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66513772 (or 66513768 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 2660550440 is about 51580.5238437920. The cubic root of 2660550440 is about 1385.6615484436.

The spelling of 2660550440 in words is "two billion, six hundred sixty million, five hundred fifty thousand, four hundred forty".