6687942 has 8 divisors (see below), whose sum is σ = 13375896. Its totient is φ = 2229312.

The previous prime is 6687931. The next prime is 6687973. The reversal of 6687942 is 2497866.

It is a sphenic number, since it is the product of 3 distinct primes.

6687942 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 6687894 and 6687903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557323 + ... + 557334.

It is an arithmetic number, because the mean of its divisors is an integer number (1671987).

Almost surely, 2^6687942 is an apocalyptic number.

6687942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6687942 is a wasteful number, since it uses less digits than its factorization.

6687942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114662.

The product of its digits is 145152, while the sum is 42.

The square root of 6687942 is about 2586.1055662907. The cubic root of 6687942 is about 188.4072017297.

The spelling of 6687942 in words is "six million, six hundred eighty-seven thousand, nine hundred forty-two".