6801640 has 32 divisors (see below), whose sum is σ = 15470280. Its totient is φ = 2691072.

The previous prime is 6801637. The next prime is 6801653. The reversal of 6801640 is 461086.

It can be written as a sum of positive squares in 4 ways, for example, as 3319684 + 3481956 = 1822^2 + 1866^2 .

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, 3004 + ... + 4756.

Almost surely, 2^6801640 is an apocalyptic number.

It is an amenable number.

6801640 is an abundant number, since it is smaller than the sum of its proper divisors (8668640).

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

6801640 is a wasteful number, since it uses less digits than its factorization.

6801640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861 (or 1857 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 6801640 is about 2607.9953987689. The cubic root of 6801640 is about 189.4688768003.

The spelling of 6801640 in words is "six million, eight hundred one thousand, six hundred forty".