2671668 has 36 divisors (see below), whose sum is σ = 6901440. Its totient is φ = 871056.

The previous prime is 2671667. The next prime is 2671679. The reversal of 2671668 is 8661762.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2671661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 903 + ... + 2481.

2^2671668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2671668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3450720).

2671668 is an abundant number, since it is smaller than the sum of its proper divisors (4229772).

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

2671668 is a wasteful number, since it uses less digits than its factorization.

2671668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636 (or 1631 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 2671668 is about 1634.5237838588. The cubic root of 2671668 is about 138.7588940001.

The spelling of 2671668 in words is "two million, six hundred seventy-one thousand, six hundred sixty-eight".