6691806 has 24 divisors (see below), whose sum is σ = 15817464. Its totient is φ = 2027760.

The previous prime is 6691801. The next prime is 6691843. The reversal of 6691806 is 6081966.

It is a super-4 number, since 4×6691806⁴ (a number of 28 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16701 + ... + 17096.

It is an arithmetic number, because the mean of its divisors is an integer number (659061).

Almost surely, 2^6691806 is an apocalyptic number.

6691806 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6691806 is an abundant number, since it is smaller than the sum of its proper divisors (9125658).

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

6691806 is a wasteful number, since it uses less digits than its factorization.

6691806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33816 (or 33813 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 6691806 is about 2586.8525276869. The cubic root of 6691806 is about 188.4434792208.

The spelling of 6691806 in words is "six million, six hundred ninety-one thousand, eight hundred six".