665143004 has 24 divisors (see below), whose sum is σ = 1202236560. Its totient is φ = 321819264.

The previous prime is 665143001. The next prime is 665143007. The reversal of 665143004 is 400341566.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (665143001) and next prime (665143007).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665143001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6014 + ... + 36965.

It is an arithmetic number, because the mean of its divisors is an integer number (50093190).

Almost surely, 2^665143004 is an apocalyptic number.

It is an amenable number.

665143004 is a deficient number, since it is larger than the sum of its proper divisors (537093556).

665143004 is a wasteful number, since it uses less digits than its factorization.

665143004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43109 (or 43107 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 665143004 is about 25790.3664960388. The cubic root of 665143004 is about 872.9144361066.

The spelling of 665143004 in words is "six hundred sixty-five million, one hundred forty-three thousand, four".