665382563 has 8 divisors (see below), whose sum is σ = 683590320. Its totient is φ = 647269120.

The previous prime is 665382551. The next prime is 665382611. The reversal of 665382563 is 365283566.

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 665382563 - 2⁴ = 665382547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665382503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9158 + ... + 37611.

It is an arithmetic number, because the mean of its divisors is an integer number (85448790).

Almost surely, 2^665382563 is an apocalyptic number.

665382563 is a deficient number, since it is larger than the sum of its proper divisors (18207757).

665382563 is a wasteful number, since it uses less digits than its factorization.

665382563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47157.

The product of its digits is 777600, while the sum is 44.

The square root of 665382563 is about 25795.0104283755. The cubic root of 665382563 is about 873.0192202949.

The spelling of 665382563 in words is "six hundred sixty-five million, three hundred eighty-two thousand, five hundred sixty-three".