6620555 has 8 divisors (see below), whose sum is σ = 8218800. Its totient is φ = 5113696.

The previous prime is 6620519. The next prime is 6620587. The reversal of 6620555 is 5550266.

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 6620555 - 2¹⁸ = 6358411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22685 + ... + 22974.

It is an arithmetic number, because the mean of its divisors is an integer number (1027350).

Almost surely, 2^6620555 is an apocalyptic number.

6620555 is a deficient number, since it is larger than the sum of its proper divisors (1598245).

6620555 is a wasteful number, since it uses less digits than its factorization.

6620555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45693.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 6620555 is about 2573.0439172311. The cubic root of 6620555 is about 187.7722740614.

The spelling of 6620555 in words is "six million, six hundred twenty thousand, five hundred fifty-five".