6720455 has 8 divisors (see below), whose sum is σ = 9216672. Its totient is φ = 4608288.

The previous prime is 6720443. The next prime is 6720473. The reversal of 6720455 is 5540276.

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 6720455 - 2¹⁶ = 6654919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95972 + ... + 96041.

It is an arithmetic number, because the mean of its divisors is an integer number (1152084).

Almost surely, 2^6720455 is an apocalyptic number.

6720455 is a deficient number, since it is larger than the sum of its proper divisors (2496217).

6720455 is a wasteful number, since it uses less digits than its factorization.

6720455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192025.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 6720455 is about 2592.3840379080. The cubic root of 6720455 is about 188.7120181458.

The spelling of 6720455 in words is "six million, seven hundred twenty thousand, four hundred fifty-five".