2664725765 has 8 divisors (see below), whose sum is σ = 3443645688. Its totient is φ = 1967797440.

The previous prime is 2664725759. The next prime is 2664725783. The reversal of 2664725765 is 5675274662.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 153412996 + 2511312769 = 12386^2 + 50113^2 .

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

It is not a de Polignac number, because 2664725765 - 2¹² = 2664721669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20497826 + ... + 20497955.

It is an arithmetic number, because the mean of its divisors is an integer number (430455711).

Almost surely, 2^2664725765 is an apocalyptic number.

It is an amenable number.

2664725765 is a deficient number, since it is larger than the sum of its proper divisors (778919923).

2664725765 is a wasteful number, since it uses less digits than its factorization.

2664725765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40995799.

The product of its digits is 4233600, while the sum is 50.

The square root of 2664725765 is about 51620.9818290974. The cubic root of 2664725765 is about 1386.3860305312.

The spelling of 2664725765 in words is "two billion, six hundred sixty-four million, seven hundred twenty-five thousand, seven hundred sixty-five".