6678543744 has 128 divisors (see below), whose sum is σ = 19792080000. Its totient is φ = 2217024000.

The previous prime is 6678543731. The next prime is 6678543749. The reversal of 6678543744 is 4473458766.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6678543749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 863607 + ... + 871305.

It is an arithmetic number, because the mean of its divisors is an integer number (154625625).

Almost surely, 2^6678543744 is an apocalyptic number.

6678543744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6678543744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9896040000).

6678543744 is an abundant number, since it is smaller than the sum of its proper divisors (13113536256).

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

6678543744 is a wasteful number, since it uses less digits than its factorization.

6678543744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7973 (or 7955 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 54.

The square root of 6678543744 is about 81722.3576752409. The cubic root of 6678543744 is about 1883.1890704510.

The spelling of 6678543744 in words is "six billion, six hundred seventy-eight million, five hundred forty-three thousand, seven hundred forty-four".