6755644440 has 48 divisors (see below), whose sum is σ = 21955845600. Its totient is φ = 1801505088.

The previous prime is 6755644439. The next prime is 6755644447. The reversal of 6755644440 is 444465576.

6755644440 is a `hidden beast` number, since 6 + 7 + 5 + 564 + 44 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6755644447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9382480 + ... + 9383199.

It is an arithmetic number, because the mean of its divisors is an integer number (457413450).

Almost surely, 2^6755644440 is an apocalyptic number.

6755644440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6755644440 is an abundant number, since it is smaller than the sum of its proper divisors (15200201160).

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

6755644440 is a wasteful number, since it uses less digits than its factorization.

6755644440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18765696 (or 18765689 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 45.

The square root of 6755644440 is about 82192.7274155080. The cubic root of 6755644440 is about 1890.4082094670.

The spelling of 6755644440 in words is "six billion, seven hundred fifty-five million, six hundred forty-four thousand, four hundred forty".