6642417 has 8 divisors (see below), whose sum is σ = 8890560. Its totient is φ = 4411280.

The previous prime is 6642409. The next prime is 6642431. The reversal of 6642417 is 7142466.

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 6642417 - 2³ = 6642409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6642487) 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, 3309 + ... + 4922.

It is an arithmetic number, because the mean of its divisors is an integer number (1111320).

Almost surely, 2^6642417 is an apocalyptic number.

It is an amenable number.

6642417 is a deficient number, since it is larger than the sum of its proper divisors (2248143).

6642417 is a wasteful number, since it uses less digits than its factorization.

6642417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8503.

The product of its digits is 8064, while the sum is 30.

The square root of 6642417 is about 2577.2886916292. The cubic root of 6642417 is about 187.9787304291.

It can be divided in two parts, 664 and 2417, that added together give a triangular number (3081 = T₇₈).

The spelling of 6642417 in words is "six million, six hundred forty-two thousand, four hundred seventeen".