6791640 has 32 divisors (see below), whose sum is σ = 20375280. Its totient is φ = 1811072.

The previous prime is 6791623. The next prime is 6791677. The reversal of 6791640 is 461976.

It is a happy number.

It is a super-2 number, since 2×6791640² = 92252747779200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28179 + ... + 28418.

Almost surely, 2^6791640 is an apocalyptic number.

6791640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6791640 is an abundant number, since it is smaller than the sum of its proper divisors (13583640).

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

6791640 is a wasteful number, since it uses less digits than its factorization.

6791640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56611 (or 56607 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 6791640 is about 2606.0775122778. The cubic root of 6791640 is about 189.3759767511.

The spelling of 6791640 in words is "six million, seven hundred ninety-one thousand, six hundred forty".