665105555516 has 12 divisors (see below), whose sum is σ = 1165917579288. Its totient is φ = 331986247152.

The previous prime is 665105555461. The next prime is 665105555531. The reversal of 665105555516 is 615555501566.

It is a congruent number.

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, 141630011 + ... + 141634706.

It is an arithmetic number, because the mean of its divisors is an integer number (97159798274).

Almost surely, 2^665105555516 is an apocalyptic number.

It is an amenable number.

665105555516 is a deficient number, since it is larger than the sum of its proper divisors (500812023772).

665105555516 is a wasteful number, since it uses less digits than its factorization.

665105555516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283265308 (or 283265306 counting only the distinct ones).

The product of its (nonzero) digits is 3375000, while the sum is 50.

The spelling of 665105555516 in words is "six hundred sixty-five billion, one hundred five million, five hundred fifty-five thousand, five hundred sixteen".