2663256520 has 16 divisors (see below), whose sum is σ = 5992327260. Its totient is φ = 1065302592.

The previous prime is 2663256493. The next prime is 2663256529. The reversal of 2663256520 is 256523662.

2663256520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2663179236 + 77284 = 51606^2 + 278^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2663256520.

It is not an unprimeable number, because it can be changed into a prime (2663256529) 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, 33290667 + ... + 33290746.

Almost surely, 2^2663256520 is an apocalyptic number.

2663256520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2663256520 is an abundant number, since it is smaller than the sum of its proper divisors (3329070740).

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

2663256520 is a wasteful number, since it uses less digits than its factorization.

2663256520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66581424 (or 66581420 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 2663256520 is about 51606.7487834682. The cubic root of 2663256520 is about 1386.1311806385.

The spelling of 2663256520 in words is "two billion, six hundred sixty-three million, two hundred fifty-six thousand, five hundred twenty".