6720478 has 4 divisors (see below), whose sum is σ = 10080720. Its totient is φ = 3360238.

The previous prime is 6720473. The next prime is 6720481. The reversal of 6720478 is 8740276.

It is a semiprime because it is the product of two primes.

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 (6720473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1680118 + ... + 1680121.

It is an arithmetic number, because the mean of its divisors is an integer number (2520180).

Almost surely, 2^6720478 is an apocalyptic number.

6720478 is a deficient number, since it is larger than the sum of its proper divisors (3360242).

6720478 is a wasteful number, since it uses less digits than its factorization.

6720478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360241.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 6720478 is about 2592.3884739753. The cubic root of 6720478 is about 188.7122334275.

The spelling of 6720478 in words is "six million, seven hundred twenty thousand, four hundred seventy-eight".