6687997848 has 128 divisors (see below), whose sum is σ = 21665280000. Its totient is φ = 1910835360.

The previous prime is 6687997847. The next prime is 6687997909. The reversal of 6687997848 is 8487997866.

It is a super-2 number, since 2×6687997848² = 89458630429705262208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687997847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28953 + ... + 119223.

It is an arithmetic number, because the mean of its divisors is an integer number (169260000).

Almost surely, 2^6687997848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6687997848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10832640000).

6687997848 is an abundant number, since it is smaller than the sum of its proper divisors (14977282152).

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

6687997848 is a wasteful number, since it uses less digits than its factorization.

6687997848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90307 (or 90283 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 72.

The square root of 6687997848 is about 81780.1800438224. The cubic root of 6687997848 is about 1884.0772616293.

The spelling of 6687997848 in words is "six billion, six hundred eighty-seven million, nine hundred ninety-seven thousand, eight hundred forty-eight".