667057216705 has 8 divisors (see below), whose sum is σ = 873238538304. Its totient is φ = 485132521200.

The previous prime is 667057216703. The next prime is 667057216741. The reversal of 667057216705 is 507612750766.

It is a happy number.

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

It is not a de Polignac number, because 667057216705 - 2¹ = 667057216703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667057216703) 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, 6064156461 + ... + 6064156570.

It is an arithmetic number, because the mean of its divisors is an integer number (109154817288).

Almost surely, 2^667057216705 is an apocalyptic number.

It is an amenable number.

667057216705 is a deficient number, since it is larger than the sum of its proper divisors (206181321599).

667057216705 is a wasteful number, since it uses less digits than its factorization.

667057216705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12128313047.

The product of its (nonzero) digits is 3704400, while the sum is 52.

The spelling of 667057216705 in words is "six hundred sixty-seven billion, fifty-seven million, two hundred sixteen thousand, seven hundred five".