663655327 has 4 divisors (see below), whose sum is σ = 663717600. Its totient is φ = 663593056.

The previous prime is 663655309. The next prime is 663655393. The reversal of 663655327 is 723556366.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 663655327 - 2¹¹ = 663653279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663655127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10663 + ... + 37960.

It is an arithmetic number, because the mean of its divisors is an integer number (165929400).

Almost surely, 2^663655327 is an apocalyptic number.

663655327 is a deficient number, since it is larger than the sum of its proper divisors (62273).

663655327 is a wasteful number, since it uses less digits than its factorization.

663655327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62272.

The product of its digits is 680400, while the sum is 43.

The square root of 663655327 is about 25761.5086320658. The cubic root of 663655327 is about 872.2631555554.

The spelling of 663655327 in words is "six hundred sixty-three million, six hundred fifty-five thousand, three hundred twenty-seven".