665006655556 has 48 divisors (see below), whose sum is σ = 1174270825728. Its totient is φ = 329518425600.

The previous prime is 665006655539. The next prime is 665006655559. The reversal of 665006655556 is 655556600566.

It is a junction number, because it is equal to n+sod(n) for n = 665006655497 and 665006655506.

It is not an unprimeable number, because it can be changed into a prime (665006655559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184057606 + ... + 184061218.

It is an arithmetic number, because the mean of its divisors is an integer number (24463975536).

Almost surely, 2^665006655556 is an apocalyptic number.

It is an amenable number.

665006655556 is a deficient number, since it is larger than the sum of its proper divisors (509264170172).

665006655556 is a wasteful number, since it uses less digits than its factorization.

665006655556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732 (or 4730 counting only the distinct ones).

The product of its (nonzero) digits is 24300000, while the sum is 55.

The spelling of 665006655556 in words is "six hundred sixty-five billion, six million, six hundred fifty-five thousand, five hundred fifty-six".