6637848881 has 4 divisors (see below), whose sum is σ = 6638080512. Its totient is φ = 6637617252.

The previous prime is 6637848823. The next prime is 6637848887. The reversal of 6637848881 is 1888487366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6637848881 - 2¹⁸ = 6637586737 is a prime.

It is a super-2 number, since 2×6637848881² = 88122075533985904322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6637848881.

It is not an unprimeable number, because it can be changed into a prime (6637848887) 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, 65561 + ... + 132566.

It is an arithmetic number, because the mean of its divisors is an integer number (1659520128).

Almost surely, 2^6637848881 is an apocalyptic number.

It is an amenable number.

6637848881 is a deficient number, since it is larger than the sum of its proper divisors (231631).

6637848881 is a wasteful number, since it uses less digits than its factorization.

6637848881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231630.

The product of its digits is 12386304, while the sum is 59.

The square root of 6637848881 is about 81472.9947958218. The cubic root of 6637848881 is about 1879.3562834063.

The spelling of 6637848881 in words is "six billion, six hundred thirty-seven million, eight hundred forty-eight thousand, eight hundred eighty-one".