665066560434 has 96 divisors (see below), whose sum is σ = 1395979565568. Its totient is φ = 211011091200.

The previous prime is 665066560381. The next prime is 665066560447. The reversal of 665066560434 is 434065660566.

It is a super-2 number, since 2×665066560434² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 709782414 + ... + 709783350.

It is an arithmetic number, because the mean of its divisors is an integer number (14541453808).

Almost surely, 2^665066560434 is an apocalyptic number.

665066560434 is an abundant number, since it is smaller than the sum of its proper divisors (730913005134).

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

665066560434 is a wasteful number, since it uses less digits than its factorization.

665066560434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872 (or 1801 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 51.

The spelling of 665066560434 in words is "six hundred sixty-five billion, sixty-six million, five hundred sixty thousand, four hundred thirty-four".