6642006 has 16 divisors (see below), whose sum is σ = 15181824. Its totient is φ = 1897704.

The previous prime is 6641983. The next prime is 6642007. The reversal of 6642006 is 6002466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642007) 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, 79030 + ... + 79113.

It is an arithmetic number, because the mean of its divisors is an integer number (948864).

Almost surely, 2^6642006 is an apocalyptic number.

6642006 is an abundant number, since it is smaller than the sum of its proper divisors (8539818).

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

6642006 is a wasteful number, since it uses less digits than its factorization.

6642006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158155.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 6642006 is about 2577.2089554400. The cubic root of 6642006 is about 187.9748532836.

The spelling of 6642006 in words is "six million, six hundred forty-two thousand, six".