6686942 has 16 divisors (see below), whose sum is σ = 10378800. Its totient is φ = 3229440.

The previous prime is 6686941. The next prime is 6686947. The reversal of 6686942 is 2496866.

It is a super-2 number, since 2×6686942² = 89430386622728, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6686942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6734 + ... + 7662.

It is an arithmetic number, because the mean of its divisors is an integer number (648675).

Almost surely, 2^6686942 is an apocalyptic number.

6686942 is a deficient number, since it is larger than the sum of its proper divisors (3691858).

6686942 is a wasteful number, since it uses less digits than its factorization.

6686942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its digits is 124416, while the sum is 41.

The square root of 6686942 is about 2585.9122181544. The cubic root of 6686942 is about 188.3978108692.

The spelling of 6686942 in words is "six million, six hundred eighty-six thousand, nine hundred forty-two".