2116612401066 has 24 divisors (see below), whose sum is σ = 4588696014084. Its totient is φ = 705121701120.

The previous prime is 2116612401061. The next prime is 2116612401083. The reversal of 2116612401066 is 6601042166112.

2116612401066 is a `hidden beast` number, since 21 + 1 + 6 + 612 + 4 + 0 + 10 + 6 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2079280364841 + 37332036225 = 1441971^2 + 193215^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2116612401066.

It is not an unprimeable number, because it can be changed into a prime (2116612401061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34615765 + ... + 34676856.

Almost surely, 2^{2116612401066} is an apocalyptic number.

2116612401066 is an abundant number, since it is smaller than the sum of its proper divisors (2472083613018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2116612401066 is a wasteful number, since it uses less digits than its factorization.

2116612401066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69294326 (or 69294323 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

Adding to 2116612401066 its reverse (6601042166112), we get a palindrome (8717654567178).

The spelling of 2116612401066 in words is "two trillion, one hundred sixteen billion, six hundred twelve million, four hundred one thousand, sixty-six".