6621055 has 16 divisors (see below), whose sum is σ = 9175104. Its totient is φ = 4492800.

The previous prime is 6621029. The next prime is 6621061. The reversal of 6621055 is 5501266.

It is not a de Polignac number, because 6621055 - 2⁷ = 6620927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2599 + ... + 4471.

It is an arithmetic number, because the mean of its divisors is an integer number (573444).

Almost surely, 2^6621055 is an apocalyptic number.

6621055 is a deficient number, since it is larger than the sum of its proper divisors (2554049).

6621055 is a wasteful number, since it uses less digits than its factorization.

6621055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 6621055 is about 2573.1410765832. The cubic root of 6621055 is about 187.7770009447. Note that the first 3 decimals are identical.

The spelling of 6621055 in words is "six million, six hundred twenty-one thousand, fifty-five".