2110161111666 has 16 divisors (see below), whose sum is σ = 4221294924000. Its totient is φ = 703224920448.

The previous prime is 2110161111607. The next prime is 2110161111697. The reversal of 2110161111666 is 6661111610112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40500991 + ... + 40553058.

It is an arithmetic number, because the mean of its divisors is an integer number (263830932750).

Almost surely, 2^{2110161111666} is an apocalyptic number.

2110161111666 is an abundant number, since it is smaller than the sum of its proper divisors (2111133812334).

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

2110161111666 is a wasteful number, since it uses less digits than its factorization.

2110161111666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81058393.

The product of its (nonzero) digits is 2592, while the sum is 33.

Adding to 2110161111666 its reverse (6661111610112), we get a palindrome (8771272721778).

The spelling of 2110161111666 in words is "two trillion, one hundred ten billion, one hundred sixty-one million, one hundred eleven thousand, six hundred sixty-six".