6921100740 has 96 divisors (see below), whose sum is σ = 20418048000. Its totient is φ = 1746859392.

The previous prime is 6921100723. The next prime is 6921100777. The reversal of 6921100740 is 470011296.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 6921100698 and 6921100707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1638351 + ... + 1642569.

It is an arithmetic number, because the mean of its divisors is an integer number (212688000).

Almost surely, 2^6921100740 is an apocalyptic number.

6921100740 is a gapful number since it is divisible by the number (60) 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 6921100740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10209024000).

6921100740 is an abundant number, since it is smaller than the sum of its proper divisors (13496947260).

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

6921100740 is a wasteful number, since it uses less digits than its factorization.

6921100740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5689 (or 5687 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 6921100740 is about 83193.1532038545. The cubic root of 6921100740 is about 1905.7169214189.

The spelling of 6921100740 in words is "six billion, nine hundred twenty-one million, one hundred thousand, seven hundred forty".