2166062521399 has 4 divisors (see below), whose sum is σ = 2475500024464. Its totient is φ = 1856625018336.

The previous prime is 2166062521397. The next prime is 2166062521451. The reversal of 2166062521399 is 9931252606612.

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

It is a cyclic number.

It is not a de Polignac number, because 2166062521399 - 2¹ = 2166062521397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166062521397) 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, 154718751522 + ... + 154718751535.

It is an arithmetic number, because the mean of its divisors is an integer number (618875006116).

Almost surely, 2^{2166062521399} is an apocalyptic number.

2166062521399 is a deficient number, since it is larger than the sum of its proper divisors (309437503065).

2166062521399 is an equidigital number, since it uses as much as digits as its factorization.

2166062521399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309437503064.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 2166062521399 in words is "two trillion, one hundred sixty-six billion, sixty-two million, five hundred twenty-one thousand, three hundred ninety-nine".