6627640 has 32 divisors (see below), whose sum is σ = 15140880. Its totient is φ = 2610432.

The previous prime is 6627629. The next prime is 6627661. The reversal of 6627640 is 467266.

It is a super-2 number, since 2×6627640² = 87851223939200, 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, 1444 + ... + 3916.

Almost surely, 2^6627640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6627640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7570440).

6627640 is an abundant number, since it is smaller than the sum of its proper divisors (8513240).

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

6627640 is a wasteful number, since it uses less digits than its factorization.

6627640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551 (or 2547 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 6627640 is about 2574.4203231019. The cubic root of 6627640 is about 187.8392318053.

The spelling of 6627640 in words is "six million, six hundred twenty-seven thousand, six hundred forty".