2665602004 has 12 divisors (see below), whose sum is σ = 5023634644. Its totient is φ = 1230277824.

The previous prime is 2665601977. The next prime is 2665602007. The reversal of 2665602004 is 4002065662.

It can be written as a sum of positive squares in 2 ways, for example, as 760104900 + 1905497104 = 27570^2 + 43652^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665602007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25630737 + ... + 25630840.

Almost surely, 2^2665602004 is an apocalyptic number.

It is an amenable number.

2665602004 is a deficient number, since it is larger than the sum of its proper divisors (2358032640).

2665602004 is a wasteful number, since it uses less digits than its factorization.

2665602004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51261594 (or 51261592 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 2665602004 is about 51629.4683683650. The cubic root of 2665602004 is about 1386.5379751697.

Adding to 2665602004 its reverse (4002065662), we get a palindrome (6667667666).

The spelling of 2665602004 in words is "two billion, six hundred sixty-five million, six hundred two thousand, four".