6721748 has 12 divisors (see below), whose sum is σ = 12832512. Its totient is φ = 3055320.

The previous prime is 6721747. The next prime is 6721751. The reversal of 6721748 is 8471276.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76340 + ... + 76427.

It is an arithmetic number, because the mean of its divisors is an integer number (1069376).

Almost surely, 2^6721748 is an apocalyptic number.

It is an amenable number.

6721748 is a deficient number, since it is larger than the sum of its proper divisors (6110764).

6721748 is a wasteful number, since it uses less digits than its factorization.

6721748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152782 (or 152780 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 6721748 is about 2592.6334102607. The cubic root of 6721748 is about 188.7241199550.

The spelling of 6721748 in words is "six million, seven hundred twenty-one thousand, seven hundred forty-eight".