2111016111666 has 48 divisors (see below), whose sum is σ = 5303709913152. Its totient is φ = 548315871840.

The previous prime is 2111016111649. The next prime is 2111016111703. The reversal of 2111016111666 is 6661116101112.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207690325 + ... + 207700488.

It is an arithmetic number, because the mean of its divisors is an integer number (110493956524).

Almost surely, 2^{2111016111666} is an apocalyptic number.

2111016111666 is an abundant number, since it is smaller than the sum of its proper divisors (3192693801486).

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

2111016111666 is a wasteful number, since it uses less digits than its factorization.

2111016111666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415390847 (or 415390836 counting only the distinct ones).

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

The spelling of 2111016111666 in words is "two trillion, one hundred eleven billion, sixteen million, one hundred eleven thousand, six hundred sixty-six".