2640668423 has 8 divisors (see below), whose sum is σ = 2687548320. Its totient is φ = 2594057760.

The previous prime is 2640668413. The next prime is 2640668441. The reversal of 2640668423 is 3248660462.

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 2640668423 - 2¹⁰ = 2640667399 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 (2640668413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47468 + ... + 86801.

It is an arithmetic number, because the mean of its divisors is an integer number (335943540).

Almost surely, 2^2640668423 is an apocalyptic number.

2640668423 is a deficient number, since it is larger than the sum of its proper divisors (46879897).

2640668423 is a wasteful number, since it uses less digits than its factorization.

2640668423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134617.

The product of its (nonzero) digits is 331776, while the sum is 41.

The square root of 2640668423 is about 51387.4344854849. The cubic root of 2640668423 is about 1382.2012797408.

The spelling of 2640668423 in words is "two billion, six hundred forty million, six hundred sixty-eight thousand, four hundred twenty-three".