666042715552 has 24 divisors (see below), whose sum is σ = 1312766830116. Its totient is φ = 332641615872.

The previous prime is 666042715531. The next prime is 666042715567. The reversal of 666042715552 is 255517240666.

It can be written as a sum of positive squares in 2 ways, for example, as 629807308816 + 36235406736 = 793604^2 + 190356^2 .

It is a super-2 number, since 2×666042715552² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 666042715496 and 666042715505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11838433 + ... + 11894560.

Almost surely, 2^666042715552 is an apocalyptic number.

It is an amenable number.

666042715552 is a deficient number, since it is larger than the sum of its proper divisors (646724114564).

666042715552 is a wasteful number, since it uses less digits than its factorization.

666042715552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23733880 (or 23733872 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 666042715552 in words is "six hundred sixty-six billion, forty-two million, seven hundred fifteen thousand, five hundred fifty-two".