665510165215 has 8 divisors (see below), whose sum is σ = 912699655200. Its totient is φ = 456349827552.

The previous prime is 665510165197. The next prime is 665510165227. The reversal of 665510165215 is 512561015566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665510165215 - 2⁹ = 665510164703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9507288040 + ... + 9507288109.

It is an arithmetic number, because the mean of its divisors is an integer number (114087456900).

Almost surely, 2^665510165215 is an apocalyptic number.

665510165215 is a deficient number, since it is larger than the sum of its proper divisors (247189489985).

665510165215 is a wasteful number, since it uses less digits than its factorization.

665510165215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19014576161.

The product of its (nonzero) digits is 270000, while the sum is 43.

The spelling of 665510165215 in words is "six hundred sixty-five billion, five hundred ten million, one hundred sixty-five thousand, two hundred fifteen".