6621159 has 8 divisors (see below), whose sum is σ = 8934912. Its totient is φ = 4360760.

The previous prime is 6621151. The next prime is 6621163. The reversal of 6621159 is 9511266.

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 6621159 - 2³ = 6621151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6621151) by changing a digit.

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, 13047 + ... + 13544.

It is an arithmetic number, because the mean of its divisors is an integer number (1116864).

Almost surely, 2^6621159 is an apocalyptic number.

6621159 is a deficient number, since it is larger than the sum of its proper divisors (2313753).

6621159 is a wasteful number, since it uses less digits than its factorization.

6621159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26677.

The product of its digits is 3240, while the sum is 30.

The square root of 6621159 is about 2573.1612852676. The cubic root of 6621159 is about 187.7779841066. Note that the first 3 decimals are identical.

The spelling of 6621159 in words is "six million, six hundred twenty-one thousand, one hundred fifty-nine".