66111060606155 has 4 divisors (see below), whose sum is σ = 79333272727392. Its totient is φ = 52888848484920.

The previous prime is 66111060606061. The next prime is 66111060606167. The reversal of 66111060606155 is 55160606011166.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-66111060606155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6611106060611 + ... + 6611106060620.

It is an arithmetic number, because the mean of its divisors is an integer number (19833318181848).

Almost surely, 2^{66111060606155} is an apocalyptic number.

66111060606155 is a deficient number, since it is larger than the sum of its proper divisors (13222212121237).

66111060606155 is a wasteful number, since it uses less digits than its factorization.

66111060606155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13222212121236.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 66111060606155 in words is "sixty-six trillion, one hundred eleven billion, sixty million, six hundred six thousand, one hundred fifty-five".