665127844253 has 16 divisors (see below), whose sum is σ = 707571976176. Its totient is φ = 623054745600.

The previous prime is 665127844207. The next prime is 665127844261. The reversal of 665127844253 is 352448721566.

It can be written as a sum of positive squares in 8 ways, for example, as 36878209369 + 628249634884 = 192037^2 + 792622^2 .

It is a cyclic number.

It is not a de Polignac number, because 665127844253 - 2⁶ = 665127844189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665127844195 and 665127844204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665127244253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9761603 + ... + 9829503.

It is an arithmetic number, because the mean of its divisors is an integer number (44223248511).

Almost surely, 2^665127844253 is an apocalyptic number.

It is an amenable number.

665127844253 is a deficient number, since it is larger than the sum of its proper divisors (42444131923).

665127844253 is a wasteful number, since it uses less digits than its factorization.

665127844253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70624.

The product of its digits is 9676800, while the sum is 53.

The spelling of 665127844253 in words is "six hundred sixty-five billion, one hundred twenty-seven million, eight hundred forty-four thousand, two hundred fifty-three".