2665983 has 4 divisors (see below), whose sum is σ = 3554648. Its totient is φ = 1777320.

The previous prime is 2665973. The next prime is 2666021. The reversal of 2665983 is 3895662.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2665983 - 2⁴ = 2665967 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2² + 6 + 6⁸ + 5⁶ + 9⁶ + 8⁶ + 3¹¹ .

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444328 + ... + 444333.

It is an arithmetic number, because the mean of its divisors is an integer number (888662).

2^2665983 is an apocalyptic number.

2665983 is a deficient number, since it is larger than the sum of its proper divisors (888665).

2665983 is an equidigital number, since it uses as much as digits as its factorization.

2665983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888664.

The product of its digits is 77760, while the sum is 39.

The square root of 2665983 is about 1632.7838191261. The cubic root of 2665983 is about 138.6604031575.

The spelling of 2665983 in words is "two million, six hundred sixty-five thousand, nine hundred eighty-three".