666305536522 has 8 divisors (see below), whose sum is σ = 1000311816672. Its totient is φ = 332868264300.

The previous prime is 666305536487. The next prime is 666305536541. The reversal of 666305536522 is 225635503666.

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

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, 142249054 + ... + 142253737.

It is an arithmetic number, because the mean of its divisors is an integer number (125038977084).

Almost surely, 2^666305536522 is an apocalyptic number.

666305536522 is a deficient number, since it is larger than the sum of its proper divisors (334006280150).

666305536522 is a wasteful number, since it uses less digits than its factorization.

666305536522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284503964.

The product of its (nonzero) digits is 5832000, while the sum is 49.

The spelling of 666305536522 in words is "six hundred sixty-six billion, three hundred five million, five hundred thirty-six thousand, five hundred twenty-two".