66115056615111 has 24 divisors (see below), whose sum is σ = 109434922465440. Its totient is φ = 37678745388096.

The previous prime is 66115056615109. The next prime is 66115056615119. The reversal of 66115056615111 is 11151665051166.

66115056615111 is a `hidden beast` number, since 6 + 6 + 1 + 15 + 0 + 5 + 6 + 615 + 1 + 11 = 666.

It is not a de Polignac number, because 66115056615111 - 2¹ = 66115056615109 is a prime.

It is a super-2 number, since 2×66115056615111² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66115056615119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1406739696 + ... + 1406786693.

It is an arithmetic number, because the mean of its divisors is an integer number (4559788436060).

Almost surely, 2^{66115056615111} is an apocalyptic number.

66115056615111 is a deficient number, since it is larger than the sum of its proper divisors (43319865850329).

66115056615111 is a wasteful number, since it uses less digits than its factorization.

66115056615111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813526775 (or 2813526772 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 45.

The spelling of 66115056615111 in words is "sixty-six trillion, one hundred fifteen billion, fifty-six million, six hundred fifteen thousand, one hundred eleven".