665610110012 has 12 divisors (see below), whose sum is σ = 1191906476376. Its totient is φ = 325065402480.

The previous prime is 665610109979. The next prime is 665610110029. The reversal of 665610110012 is 210011016566.

665610110012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1934912939 + ... + 1934913282.

It is an arithmetic number, because the mean of its divisors is an integer number (99325539698).

Almost surely, 2^665610110012 is an apocalyptic number.

It is an amenable number.

665610110012 is a deficient number, since it is larger than the sum of its proper divisors (526296366364).

665610110012 is a wasteful number, since it uses less digits than its factorization.

665610110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869826268 (or 3869826266 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 665610110012 its reverse (210011016566), we get a palindrome (875621126578).

The spelling of 665610110012 in words is "six hundred sixty-five billion, six hundred ten million, one hundred ten thousand, twelve".