66656001705 has 8 divisors (see below), whose sum is σ = 106649602752. Its totient is φ = 35549867568.

The previous prime is 66656001661. The next prime is 66656001707. The reversal of 66656001705 is 50710065666.

66656001705 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 not a de Polignac number, because 66656001705 - 2¹⁵ = 66655968937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66656001707) 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, 2221866709 + ... + 2221866738.

It is an arithmetic number, because the mean of its divisors is an integer number (13331200344).

Almost surely, 2^66656001705 is an apocalyptic number.

It is an amenable number.

66656001705 is a deficient number, since it is larger than the sum of its proper divisors (39993601047).

66656001705 is a wasteful number, since it uses less digits than its factorization.

66656001705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443733455.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 66656001705 in words is "sixty-six billion, six hundred fifty-six million, one thousand, seven hundred five".