2166571606984 has 16 divisors (see below), whose sum is σ = 4062526783920. Its totient is φ = 1083231131280.

The previous prime is 2166571606981. The next prime is 2166571607017. The reversal of 2166571606984 is 4896061756612.

It is not an unprimeable number, because it can be changed into a prime (2166571606981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6665362 + ... + 6982849.

It is an arithmetic number, because the mean of its divisors is an integer number (253907923995).

Almost surely, 2^{2166571606984} is an apocalyptic number.

It is an amenable number.

2166571606984 is a deficient number, since it is larger than the sum of its proper divisors (1895955176936).

2166571606984 is a wasteful number, since it uses less digits than its factorization.

2166571606984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13668060 (or 13668056 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 2166571606984 in words is "two trillion, one hundred sixty-six billion, five hundred seventy-one million, six hundred six thousand, nine hundred eighty-four".