2631666 has 8 divisors (see below), whose sum is σ = 5263344. Its totient is φ = 877220.

The previous prime is 2631661. The next prime is 2631679. The reversal of 2631666 is 6661362.

2631666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

2631666 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2631661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219300 + ... + 219311.

It is an arithmetic number, because the mean of its divisors is an integer number (657918).

2^2631666 is an apocalyptic number.

2631666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2631666 is a wasteful number, since it uses less digits than its factorization.

2631666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438616.

The product of its digits is 7776, while the sum is 30.

The square root of 2631666 is about 1622.2410425088. The cubic root of 2631666 is about 138.0628782981.

The spelling of 2631666 in words is "two million, six hundred thirty-one thousand, six hundred sixty-six".