667445536705 has 8 divisors (see below), whose sum is σ = 802228564800. Its totient is φ = 533093815536.

The previous prime is 667445536697. The next prime is 667445536801. The reversal of 667445536705 is 507635544766.

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 667445536705 - 2³ = 667445536697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667445536705.

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, 107823325 + ... + 107829514.

It is an arithmetic number, because the mean of its divisors is an integer number (100278570600).

Almost surely, 2^667445536705 is an apocalyptic number.

It is an amenable number.

667445536705 is a deficient number, since it is larger than the sum of its proper divisors (134783028095).

667445536705 is a wasteful number, since it uses less digits than its factorization.

667445536705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215653463.

The product of its (nonzero) digits is 63504000, while the sum is 58.

The spelling of 667445536705 in words is "six hundred sixty-seven billion, four hundred forty-five million, five hundred thirty-six thousand, seven hundred five".