665387038 has 32 divisors (see below), whose sum is σ = 1098102528. Its totient is φ = 301017600.

The previous prime is 665387017. The next prime is 665387077. The reversal of 665387038 is 830783566.

It is a super-3 number, since 3×665387038³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163468 + ... + 167488.

It is an arithmetic number, because the mean of its divisors is an integer number (34315704).

Almost surely, 2^665387038 is an apocalyptic number.

665387038 is a deficient number, since it is larger than the sum of its proper divisors (432715490).

665387038 is a wasteful number, since it uses less digits than its factorization.

665387038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 665387038 is about 25795.0971698112. The cubic root of 665387038 is about 873.0211774408.

The spelling of 665387038 in words is "six hundred sixty-five million, three hundred eighty-seven thousand, thirty-eight".