6642215 has 8 divisors (see below), whose sum is σ = 8227968. Its totient is φ = 5142240.

The previous prime is 6642211. The next prime is 6642281. The reversal of 6642215 is 5122466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6642215 - 2² = 6642211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21272 + ... + 21581.

It is an arithmetic number, because the mean of its divisors is an integer number (1028496).

Almost surely, 2^6642215 is an apocalyptic number.

6642215 is a deficient number, since it is larger than the sum of its proper divisors (1585753).

6642215 is a wasteful number, since it uses less digits than its factorization.

6642215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42889.

The product of its digits is 2880, while the sum is 26.

The square root of 6642215 is about 2577.2495028615. The cubic root of 6642215 is about 187.9768248934.

The spelling of 6642215 in words is "six million, six hundred forty-two thousand, two hundred fifteen".