665001143 has 2 divisors, whose sum is σ = 665001144. Its totient is φ = 665001142.

The previous prime is 665001137. The next prime is 665001173. The reversal of 665001143 is 341100566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665001143 - 2⁶ = 665001079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665001133) 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 as a sum of consecutive naturals, namely, 332500571 + 332500572.

It is an arithmetic number, because the mean of its divisors is an integer number (332500572).

Almost surely, 2^665001143 is an apocalyptic number.

665001143 is a deficient number, since it is larger than the sum of its proper divisors (1).

665001143 is an equidigital number, since it uses as much as digits as its factorization.

665001143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 665001143 is about 25787.6160782652. The cubic root of 665001143 is about 872.8523736034.

The spelling of 665001143 in words is "six hundred sixty-five million, one thousand, one hundred forty-three".