2166707667584 has 32 divisors (see below), whose sum is σ = 4316844767040. Its totient is φ = 1083264275200.

The previous prime is 2166707667583. The next prime is 2166707667601. The reversal of 2166707667584 is 4857667076612.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2166707667584.

It is not an unprimeable number, because it can be changed into a prime (2166707667583) 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, 868409 + ... + 2255559.

It is an arithmetic number, because the mean of its divisors is an integer number (134901398970).

Almost surely, 2^{2166707667584} is an apocalyptic number.

It is an amenable number.

2166707667584 is a deficient number, since it is larger than the sum of its proper divisors (2150137099456).

2166707667584 is a wasteful number, since it uses less digits than its factorization.

2166707667584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399368 (or 1399356 counting only the distinct ones).

The product of its (nonzero) digits is 142248960, while the sum is 65.

The spelling of 2166707667584 in words is "two trillion, one hundred sixty-six billion, seven hundred seven million, six hundred sixty-seven thousand, five hundred eighty-four".