6642270 has 64 divisors (see below), whose sum is σ = 18008640. Its totient is φ = 1741824.

The previous prime is 6642211. The next prime is 6642281. The reversal of 6642270 is 722466.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 19542 + ... + 19878.

It is an arithmetic number, because the mean of its divisors is an integer number (281385).

Almost surely, 2^6642270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6642270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9004320).

6642270 is an abundant number, since it is smaller than the sum of its proper divisors (11366370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6642270 is a wasteful number, since it uses less digits than its factorization.

6642270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 6642270 is about 2577.2601731296. The cubic root of 6642270 is about 187.9773437312.

The spelling of 6642270 in words is "six million, six hundred forty-two thousand, two hundred seventy".