660617215711 has 8 divisors (see below), whose sum is σ = 660865353120. Its totient is φ = 660369134592.

The previous prime is 660617215703. The next prime is 660617215733. The reversal of 660617215711 is 117512716066.

It is a happy number.

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 660617215711 - 2³ = 660617215703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660617215411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51835206 + ... + 51847948.

It is an arithmetic number, because the mean of its divisors is an integer number (82608169140).

Almost surely, 2^660617215711 is an apocalyptic number.

660617215711 is a deficient number, since it is larger than the sum of its proper divisors (248137409).

660617215711 is a wasteful number, since it uses less digits than its factorization.

660617215711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28145.

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 660617215711 in words is "six hundred sixty billion, six hundred seventeen million, two hundred fifteen thousand, seven hundred eleven".