2166832727266 has 4 divisors (see below), whose sum is σ = 3250249090902. Its totient is φ = 1083416363632.

The previous prime is 2166832727221. The next prime is 2166832727281. The reversal of 2166832727266 is 6627272386612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2153218738225 + 13613989041 = 1467385^2 + 116679^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2166832727266.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541708181815 + ... + 541708181818.

Almost surely, 2^{2166832727266} is an apocalyptic number.

2166832727266 is a deficient number, since it is larger than the sum of its proper divisors (1083416363636).

2166832727266 is a wasteful number, since it uses less digits than its factorization.

2166832727266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083416363635.

The product of its digits is 24385536, while the sum is 58.

The spelling of 2166832727266 in words is "two trillion, one hundred sixty-six billion, eight hundred thirty-two million, seven hundred twenty-seven thousand, two hundred sixty-six".