665637853255 has 8 divisors (see below), whose sum is σ = 811859939424. Its totient is φ = 523780605600.

The previous prime is 665637853247. The next prime is 665637853289. The reversal of 665637853255 is 552358736566.

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

It is not a de Polignac number, because 665637853255 - 2³ = 665637853247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665637853193 and 665637853202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091209291 + ... + 1091209900.

It is an arithmetic number, because the mean of its divisors is an integer number (101482492428).

Almost surely, 2^665637853255 is an apocalyptic number.

665637853255 is a deficient number, since it is larger than the sum of its proper divisors (146222086169).

665637853255 is a wasteful number, since it uses less digits than its factorization.

665637853255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182419257.

The product of its digits is 136080000, while the sum is 61.

The spelling of 665637853255 in words is "six hundred sixty-five billion, six hundred thirty-seven million, eight hundred fifty-three thousand, two hundred fifty-five".