6721704 has 160 divisors (see below), whose sum is σ = 21954240. Its totient is φ = 1900800.

The previous prime is 6721691. The next prime is 6721711. The reversal of 6721704 is 4071276.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 163924 + ... + 163964.

It is an arithmetic number, because the mean of its divisors is an integer number (137214).

Almost surely, 2^6721704 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 6721704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10977120).

6721704 is an abundant number, since it is smaller than the sum of its proper divisors (15232536).

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

6721704 is a wasteful number, since it uses less digits than its factorization.

6721704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 6721704 is about 2592.6249246661. The cubic root of 6721704 is about 188.7237081634.

The spelling of 6721704 in words is "six million, seven hundred twenty-one thousand, seven hundred four".