66601272705 has 32 divisors (see below), whose sum is σ = 116308224000. Its totient is φ = 32275212480.

The previous prime is 66601272677. The next prime is 66601272737. The reversal of 66601272705 is 50727210666.

66601272705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66601272705 - 2¹⁸ = 66601010561 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228874 + ... + 430796.

It is an arithmetic number, because the mean of its divisors is an integer number (3634632000).

Almost surely, 2^66601272705 is an apocalyptic number.

It is an amenable number.

66601272705 is a deficient number, since it is larger than the sum of its proper divisors (49706951295).

66601272705 is a wasteful number, since it uses less digits than its factorization.

66601272705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203941.

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 66601272705 in words is "sixty-six billion, six hundred one million, two hundred seventy-two thousand, seven hundred five".