2600665040 has 20 divisors (see below), whose sum is σ = 6046546404. Its totient is φ = 1040265984.

The previous prime is 2600665021. The next prime is 2600665057. The reversal of 2600665040 is 405660062.

It can be written as a sum of positive squares in 2 ways, for example, as 352387984 + 2248277056 = 18772^2 + 47416^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 2600664994 and 2600665012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16254077 + ... + 16254236.

Almost surely, 2^2600665040 is an apocalyptic number.

2600665040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2600665040 is an abundant number, since it is smaller than the sum of its proper divisors (3445881364).

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

2600665040 is a wasteful number, since it uses less digits than its factorization.

2600665040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32508326 (or 32508320 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2600665040 is about 50996.7159726977. The cubic root of 2600665040 is about 1375.1860975666.

The spelling of 2600665040 in words is "two billion, six hundred million, six hundred sixty-five thousand, forty".