665066004 has 12 divisors (see below), whose sum is σ = 1551820704. Its totient is φ = 221688664.

The previous prime is 665065997. The next prime is 665066021. The reversal of 665066004 is 400660566.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27711072 + ... + 27711095.

It is an arithmetic number, because the mean of its divisors is an integer number (129318392).

Almost surely, 2^665066004 is an apocalyptic number.

It is an amenable number.

665066004 is an abundant number, since it is smaller than the sum of its proper divisors (886754700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665066004 is a wasteful number, since it uses less digits than its factorization.

665066004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55422174 (or 55422172 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 665066004 is about 25788.8736473697. The cubic root of 665066004 is about 872.8807506159.

The spelling of 665066004 in words is "six hundred sixty-five million, sixty-six thousand, four".