665100056511 has 48 divisors (see below), whose sum is σ = 1081063395360. Its totient is φ = 390483452160.

The previous prime is 665100056507. The next prime is 665100056531. The reversal of 665100056511 is 115650001566.

It is not a de Polignac number, because 665100056511 - 2² = 665100056507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665100056531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 442381 + ... + 1235273.

It is an arithmetic number, because the mean of its divisors is an integer number (22522154070).

Almost surely, 2^665100056511 is an apocalyptic number.

665100056511 is a deficient number, since it is larger than the sum of its proper divisors (415963338849).

665100056511 is a wasteful number, since it uses less digits than its factorization.

665100056511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793176 (or 793173 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

Subtracting from 665100056511 its reverse (115650001566), we obtain a palindrome (549450054945).

The spelling of 665100056511 in words is "six hundred sixty-five billion, one hundred million, fifty-six thousand, five hundred eleven".