2164603051666 has 64 divisors (see below), whose sum is σ = 3671161159680. Its totient is φ = 948765058560.

The previous prime is 2164603051661. The next prime is 2164603051711. The reversal of 2164603051666 is 6661503064612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2164603051661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22318065 + ... + 22414843.

It is an arithmetic number, because the mean of its divisors is an integer number (57361893120).

Almost surely, 2^{2164603051666} is an apocalyptic number.

2164603051666 is a deficient number, since it is larger than the sum of its proper divisors (1506558108014).

2164603051666 is a wasteful number, since it uses less digits than its factorization.

2164603051666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97159.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 2164603051666 in words is "two trillion, one hundred sixty-four billion, six hundred three million, fifty-one thousand, six hundred sixty-six".