6621017 has 8 divisors (see below), whose sum is σ = 7163520. Its totient is φ = 6083280.

The previous prime is 6620981. The next prime is 6621029. The reversal of 6621017 is 7101266.

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 6621017 - 2⁶ = 6620953 is a prime.

It is a super-2 number, since 2×6621017² = 87675732228578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6620983 and 6621001.

It is not an unprimeable number, because it can be changed into a prime (6620017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2042 + ... + 4172.

It is an arithmetic number, because the mean of its divisors is an integer number (895440).

Almost surely, 2^6621017 is an apocalyptic number.

It is an amenable number.

6621017 is a deficient number, since it is larger than the sum of its proper divisors (542503).

6621017 is a wasteful number, since it uses less digits than its factorization.

6621017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 6621017 is about 2573.1336926013. The cubic root of 6621017 is about 187.7766417099.

Subtracting 6621017 from its reverse (7101266), we obtain a square (480249 = 693²).

The spelling of 6621017 in words is "six million, six hundred twenty-one thousand, seventeen".