4072765506665 has 16 divisors (see below), whose sum is σ = 5179160180880. Its totient is φ = 3069131950080.

The previous prime is 4072765506559. The next prime is 4072765506701. The reversal of 4072765506665 is 5666055672704.

It can be written as a sum of positive squares in 8 ways, for example, as 1545021654121 + 2527743852544 = 1242989^2 + 1589888^2 .

It is not a de Polignac number, because 4072765506665 - 2²⁰ = 4072764458089 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342531104 + ... + 342542993.

It is an arithmetic number, because the mean of its divisors is an integer number (323697511305).

Almost surely, 2^{4072765506665} is an apocalyptic number.

It is an amenable number.

4072765506665 is a deficient number, since it is larger than the sum of its proper divisors (1106394674215).

4072765506665 is a wasteful number, since it uses less digits than its factorization.

4072765506665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685074172.

The product of its (nonzero) digits is 63504000, while the sum is 59.

The spelling of 4072765506665 in words is "four trillion, seventy-two billion, seven hundred sixty-five million, five hundred six thousand, six hundred sixty-five".