6691942 has 8 divisors (see below), whose sum is σ = 10474416. Its totient is φ = 3200472.

The previous prime is 6691903. The next prime is 6691943. The reversal of 6691942 is 2491966.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691943) 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 3 ways as a sum of consecutive naturals, for example, 72693 + ... + 72784.

It is an arithmetic number, because the mean of its divisors is an integer number (1309302).

Almost surely, 2^6691942 is an apocalyptic number.

6691942 is a deficient number, since it is larger than the sum of its proper divisors (3782474).

6691942 is a wasteful number, since it uses less digits than its factorization.

6691942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145502.

The product of its digits is 23328, while the sum is 37.

The square root of 6691942 is about 2586.8788143243. The cubic root of 6691942 is about 188.4447558139. Note that the first 3 decimals are identical.

The spelling of 6691942 in words is "six million, six hundred ninety-one thousand, nine hundred forty-two".