666535614215 has 8 divisors (see below), whose sum is σ = 807180744480. Its totient is φ = 528336486432.

The previous prime is 666535614209. The next prime is 666535614229. The reversal of 666535614215 is 512416535666.

666535614215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 666535614215 - 2¹² = 666535610119 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, 611500019 + ... + 611501108.

It is an arithmetic number, because the mean of its divisors is an integer number (100897593060).

Almost surely, 2^666535614215 is an apocalyptic number.

666535614215 is a deficient number, since it is larger than the sum of its proper divisors (140645130265).

666535614215 is a wasteful number, since it uses less digits than its factorization.

666535614215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223001241.

The product of its digits is 3888000, while the sum is 50.

The spelling of 666535614215 in words is "six hundred sixty-six billion, five hundred thirty-five million, six hundred fourteen thousand, two hundred fifteen".