6642618 has 32 divisors (see below), whose sum is σ = 13934592. Its totient is φ = 2108400.

The previous prime is 6642613. The next prime is 6642619. The reversal of 6642618 is 8162466.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12955 + ... + 13457.

It is an arithmetic number, because the mean of its divisors is an integer number (435456).

Almost surely, 2^6642618 is an apocalyptic number.

6642618 is an abundant number, since it is smaller than the sum of its proper divisors (7291974).

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

6642618 is a wasteful number, since it uses less digits than its factorization.

6642618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610.

The product of its digits is 13824, while the sum is 33.

The square root of 6642618 is about 2577.3276858017. The cubic root of 6642618 is about 187.9806264931.

It can be divided in two parts, 6642 and 618, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 6642618 in words is "six million, six hundred forty-two thousand, six hundred eighteen".