6721933920 has 96 divisors (see below), whose sum is σ = 22802889312. Its totient is φ = 1654628352.

The previous prime is 6721933919. The next prime is 6721933927. The reversal of 6721933920 is 293391276.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721933927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532377 + ... + 544856.

It is an arithmetic number, because the mean of its divisors is an integer number (237530097).

Almost surely, 2^6721933920 is an apocalyptic number.

6721933920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6721933920 is an abundant number, since it is smaller than the sum of its proper divisors (16080955392).

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

6721933920 is a wasteful number, since it uses less digits than its factorization.

6721933920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077264 (or 1077256 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 6721933920 is about 81987.4009833218. The cubic root of 6721933920 is about 1887.2585994215.

The spelling of 6721933920 in words is "six billion, seven hundred twenty-one million, nine hundred thirty-three thousand, nine hundred twenty".