2684664121 has 4 divisors (see below), whose sum is σ = 2801388672. Its totient is φ = 2567939572.

The previous prime is 2684664119. The next prime is 2684664127. The reversal of 2684664121 is 1214664862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1214664862 = 2 ⋅607332431.

It is a cyclic number.

It is not a de Polignac number, because 2684664121 - 2¹ = 2684664119 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2684664127) 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, 58362241 + ... + 58362286.

It is an arithmetic number, because the mean of its divisors is an integer number (700347168).

Almost surely, 2^2684664121 is an apocalyptic number.

It is an amenable number.

2684664121 is a deficient number, since it is larger than the sum of its proper divisors (116724551).

2684664121 is a wasteful number, since it uses less digits than its factorization.

2684664121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116724550.

The product of its digits is 110592, while the sum is 40.

The square root of 2684664121 is about 51813.7445182260. The cubic root of 2684664121 is about 1389.8352410689.

The spelling of 2684664121 in words is "two billion, six hundred eighty-four million, six hundred sixty-four thousand, one hundred twenty-one".