2600662640 has 20 divisors (see below), whose sum is σ = 6046540824. Its totient is φ = 1040265024.

The previous prime is 2600662637. The next prime is 2600662651. The reversal of 2600662640 is 462660062.

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 = 2600662597 and 2600662606.

It is a congruent number.

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, 16254062 + ... + 16254221.

Almost surely, 2^2600662640 is an apocalyptic number.

2600662640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2600662640 is an abundant number, since it is smaller than the sum of its proper divisors (3445878184).

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

2600662640 is a wasteful number, since it uses less digits than its factorization.

2600662640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32508296 (or 32508290 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 2600662640 is about 50996.6924417653. The cubic root of 2600662640 is about 1375.1856745404.

The spelling of 2600662640 in words is "two billion, six hundred million, six hundred sixty-two thousand, six hundred forty".