6687422 has 12 divisors (see below), whose sum is σ = 11669040. Its totient is φ = 2865996.

The previous prime is 6687391. The next prime is 6687427. The reversal of 6687422 is 2247866.

6687422 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×6687422² = 89443226012168, which contains 22 as substring.

6687422 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687427) 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, 34022 + ... + 34217.

It is an arithmetic number, because the mean of its divisors is an integer number (972420).

Almost surely, 2^6687422 is an apocalyptic number.

6687422 is a deficient number, since it is larger than the sum of its proper divisors (4981618).

6687422 is a wasteful number, since it uses less digits than its factorization.

6687422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68255 (or 68248 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 6687422 is about 2586.0050270639. The cubic root of 6687422 is about 188.4023185991.

The spelling of 6687422 in words is "six million, six hundred eighty-seven thousand, four hundred twenty-two".