2663256557 has 32 divisors (see below), whose sum is σ = 3110849280. Its totient is φ = 2261306880.

The previous prime is 2663256553. The next prime is 2663256571. The reversal of 2663256557 is 7556523662.

It is a cyclic number.

It is not a de Polignac number, because 2663256557 - 2² = 2663256553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2663256553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 662648 + ... + 666654.

It is an arithmetic number, because the mean of its divisors is an integer number (97214040).

Almost surely, 2^2663256557 is an apocalyptic number.

It is an amenable number.

2663256557 is a deficient number, since it is larger than the sum of its proper divisors (447592723).

2663256557 is a wasteful number, since it uses less digits than its factorization.

2663256557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4133.

The product of its digits is 2268000, while the sum is 47.

The square root of 2663256557 is about 51606.7491419485. The cubic root of 2663256557 is about 1386.1311870575.

The spelling of 2663256557 in words is "two billion, six hundred sixty-three million, two hundred fifty-six thousand, five hundred fifty-seven".