665203143 has 16 divisors (see below), whose sum is σ = 969897600. Its totient is φ = 402182880.

The previous prime is 665203127. The next prime is 665203157. The reversal of 665203143 is 341302566.

It is not a de Polignac number, because 665203143 - 2⁴ = 665203127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665203143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665203193) 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, 10228 + ... + 37881.

It is an arithmetic number, because the mean of its divisors is an integer number (60618600).

Almost surely, 2^665203143 is an apocalyptic number.

665203143 is a deficient number, since it is larger than the sum of its proper divisors (304694457).

665203143 is a wasteful number, since it uses less digits than its factorization.

665203143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48542.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 665203143 is about 25791.5323895266. The cubic root of 665203143 is about 872.9407435417.

The spelling of 665203143 in words is "six hundred sixty-five million, two hundred three thousand, one hundred forty-three".