6720445 has 8 divisors (see below), whose sum is σ = 8084736. Its totient is φ = 5362896.

The previous prime is 6720443. The next prime is 6720473. The reversal of 6720445 is 5440276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6720445 - 2¹ = 6720443 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720443) 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, 864 + ... + 3766.

It is an arithmetic number, because the mean of its divisors is an integer number (1010592).

Almost surely, 2^6720445 is an apocalyptic number.

It is an amenable number.

6720445 is a deficient number, since it is larger than the sum of its proper divisors (1364291).

6720445 is a wasteful number, since it uses less digits than its factorization.

6720445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 6720445 is about 2592.3821091807. The cubic root of 6720445 is about 188.7119245450.

The spelling of 6720445 in words is "six million, seven hundred twenty thousand, four hundred forty-five".