6721716 has 24 divisors (see below), whose sum is σ = 16108960. Its totient is φ = 2179872.

The previous prime is 6721711. The next prime is 6721723. The reversal of 6721716 is 6171276.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7126 + ... + 8013.

Almost surely, 2^6721716 is an apocalyptic number.

It is an amenable number.

6721716 is an abundant number, since it is smaller than the sum of its proper divisors (9387244).

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

6721716 is a wasteful number, since it uses less digits than its factorization.

6721716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15183 (or 15181 counting only the distinct ones).

The product of its digits is 3528, while the sum is 30.

The square root of 6721716 is about 2592.6272389219. The cubic root of 6721716 is about 188.7238204704.

The spelling of 6721716 in words is "six million, seven hundred twenty-one thousand, seven hundred sixteen".