665155427663 has 8 divisors (see below), whose sum is σ = 671772722400. Its totient is φ = 658566842080.

The previous prime is 665155427641. The next prime is 665155427681. The reversal of 665155427663 is 366724551566.

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

It is a cyclic number.

It is not a de Polignac number, because 665155427663 - 2¹⁶ = 665155362127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665155427599 and 665155427608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665155427683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7130720 + ... + 7223397.

It is an arithmetic number, because the mean of its divisors is an integer number (83971590300).

Almost surely, 2^665155427663 is an apocalyptic number.

665155427663 is a deficient number, since it is larger than the sum of its proper divisors (6617294737).

665155427663 is a wasteful number, since it uses less digits than its factorization.

665155427663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14354577.

The product of its digits is 27216000, while the sum is 56.

The spelling of 665155427663 in words is "six hundred sixty-five billion, one hundred fifty-five million, four hundred twenty-seven thousand, six hundred sixty-three".