2166001052693 has 8 divisors (see below), whose sum is σ = 2308020607512. Its totient is φ = 2025604578816.

The previous prime is 2166001052651. The next prime is 2166001052753. The reversal of 2166001052693 is 3962501006612.

It can be written as a sum of positive squares in 4 ways, for example, as 1110290012209 + 1055711040484 = 1053703^2 + 1027478^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2166001052693 - 2²⁶ = 2165933943829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2166001052693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166001052603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405767480 + ... + 405772817.

It is an arithmetic number, because the mean of its divisors is an integer number (288502575939).

Almost surely, 2^{2166001052693} is an apocalyptic number.

It is an amenable number.

2166001052693 is a deficient number, since it is larger than the sum of its proper divisors (142019554819).

2166001052693 is a wasteful number, since it uses less digits than its factorization.

2166001052693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811540471.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 2166001052693 in words is "two trillion, one hundred sixty-six billion, one million, fifty-two thousand, six hundred ninety-three".