6711640 has 32 divisors (see below), whose sum is σ = 16264080. Its totient is φ = 2477952.

The previous prime is 6711637. The next prime is 6711641. The reversal of 6711640 is 461176.

It is a happy number.

It is a super-2 number, since 2×6711640² = 90092222979200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6711641) 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, 5934 + ... + 6973.

Almost surely, 2^6711640 is an apocalyptic number.

It is an amenable number.

6711640 is an abundant number, since it is smaller than the sum of its proper divisors (9552440).

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

6711640 is a wasteful number, since it uses less digits than its factorization.

6711640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12931 (or 12927 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 6711640 is about 2590.6833075465. The cubic root of 6711640 is about 188.6294729269.

The spelling of 6711640 in words is "six million, seven hundred eleven thousand, six hundred forty".