66116110655 has 16 divisors (see below), whose sum is σ = 92210365440. Its totient is φ = 44568340512.

The previous prime is 66116110631. The next prime is 66116110691. The reversal of 66116110655 is 55601161166.

It is a cyclic number.

It is not a de Polignac number, because 66116110655 - 2⁸ = 66116110399 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16006679 + ... + 16010808.

It is an arithmetic number, because the mean of its divisors is an integer number (5763147840).

Almost surely, 2^66116110655 is an apocalyptic number.

66116110655 is a deficient number, since it is larger than the sum of its proper divisors (26094254785).

66116110655 is a wasteful number, since it uses less digits than its factorization.

66116110655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32017558.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 66116110655 in words is "sixty-six billion, one hundred sixteen million, one hundred ten thousand, six hundred fifty-five".