6635648 has 32 divisors (see below), whose sum is σ = 13512960. Its totient is φ = 3244288.

The previous prime is 6635633. The next prime is 6635659. The reversal of 6635648 is 8465366.

6635648 is nontrivially palindromic in base 15.

It is a tau number, because it is divible by the number of its divisors (32).

Its product of digits (103680) is a multiple of the sum of its prime divisors (1152).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5465 + ... + 6567.

It is an arithmetic number, because the mean of its divisors is an integer number (422280).

Almost surely, 2^6635648 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 6635648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6756480).

6635648 is an abundant number, since it is smaller than the sum of its proper divisors (6877312).

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

6635648 is a wasteful number, since it uses less digits than its factorization.

6635648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164 (or 1152 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 6635648 is about 2575.9751551597. The cubic root of 6635648 is about 187.9148550608.

The spelling of 6635648 in words is "six million, six hundred thirty-five thousand, six hundred forty-eight".