665038983 has 16 divisors (see below), whose sum is σ = 1038110976. Its totient is φ = 370752960.

The previous prime is 665038961. The next prime is 665038987. The reversal of 665038983 is 389830566.

665038983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665038983 - 2⁸ = 665038727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665038987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385341 + ... + 387062.

It is an arithmetic number, because the mean of its divisors is an integer number (64881936).

Almost surely, 2^665038983 is an apocalyptic number.

665038983 is a deficient number, since it is larger than the sum of its proper divisors (373071993).

665038983 is a wasteful number, since it uses less digits than its factorization.

665038983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772454.

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 665038983 is about 25788.3497533285. The cubic root of 665038983 is about 872.8689290172.

The spelling of 665038983 in words is "six hundred sixty-five million, thirty-eight thousand, nine hundred eighty-three".