6683640 has 32 divisors (see below), whose sum is σ = 20051280. Its totient is φ = 1782272.

The previous prime is 6683627. The next prime is 6683641. The reversal of 6683640 is 463866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6683641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27729 + ... + 27968.

Almost surely, 2^6683640 is an apocalyptic number.

6683640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6683640 is an abundant number, since it is smaller than the sum of its proper divisors (13367640).

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

6683640 is a wasteful number, since it uses less digits than its factorization.

6683640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55711 (or 55707 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 6683640 is about 2585.2736799032. The cubic root of 6683640 is about 188.3667955961.

The spelling of 6683640 in words is "six million, six hundred eighty-three thousand, six hundred forty".