6687997803 has 6 divisors (see below), whose sum is σ = 9660441284. Its totient is φ = 4458665196.

The previous prime is 6687997801. The next prime is 6687997847. The reversal of 6687997803 is 3087997866.

It is a happy number.

6687997803 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6687997803 - 2¹ = 6687997801 is a prime.

It is a super-2 number, since 2×6687997803² = 89458629225865653618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6687997801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 371555425 + ... + 371555442.

Almost surely, 2^6687997803 is an apocalyptic number.

6687997803 is a deficient number, since it is larger than the sum of its proper divisors (2972443481).

6687997803 is a wasteful number, since it uses less digits than its factorization.

6687997803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743110873 (or 743110870 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The square root of 6687997803 is about 81780.1797686946. The cubic root of 6687997803 is about 1884.0772574036.

Adding to 6687997803 its sum of digits (63), we get a palindrome (6687997866).

The spelling of 6687997803 in words is "six billion, six hundred eighty-seven million, nine hundred ninety-seven thousand, eight hundred three".