66156655166111 has 16 divisors (see below), whose sum is σ = 71339281275360. Its totient is φ = 61144192811520.

The previous prime is 66156655166023. The next prime is 66156655166131. The reversal of 66156655166111 is 11166155665166.

It is a cyclic number.

It is not a de Polignac number, because 66156655166111 - 2¹⁸ = 66156654903967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66156655166131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24352355 + ... + 26932331.

It is an arithmetic number, because the mean of its divisors is an integer number (4458705079710).

Almost surely, 2^{66156655166111} is an apocalyptic number.

66156655166111 is a deficient number, since it is larger than the sum of its proper divisors (5182626109249).

66156655166111 is a wasteful number, since it uses less digits than its factorization.

66156655166111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612954.

The product of its digits is 5832000, while the sum is 56.

The spelling of 66156655166111 in words is "sixty-six trillion, one hundred fifty-six billion, six hundred fifty-five million, one hundred sixty-six thousand, one hundred eleven".