2538666 has 48 divisors (see below), whose sum is σ = 6246240. Its totient is φ = 738720.

The previous prime is 2538659. The next prime is 2538667. The reversal of 2538666 is 6668352.

It is a self number, because there is not a number n which added to its sum of digits gives 2538666.

It is not an unprimeable number, because it can be changed into a prime (2538667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4161 + ... + 4731.

It is an arithmetic number, because the mean of its divisors is an integer number (130130).

2^2538666 is an apocalyptic number.

2538666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2538666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3123120).

2538666 is an abundant number, since it is smaller than the sum of its proper divisors (3707574).

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

2538666 is a wasteful number, since it uses less digits than its factorization.

2538666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 608 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2538666 is about 1593.3191770640. The cubic root of 2538666 is about 136.4170086833.

It can be divided in two parts, 25386 and 66, that added together give a palindrome (25452).

The spelling of 2538666 in words is "two million, five hundred thirty-eight thousand, six hundred sixty-six".