2668640433 has 8 divisors (see below), whose sum is σ = 3767492448. Its totient is φ = 1674441024.

The previous prime is 2668640423. The next prime is 2668640441. The reversal of 2668640433 is 3340468662.

It is a happy number.

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

It is not a de Polignac number, because 2668640433 - 2⁶ = 2668640369 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2668640413) 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, 26163091 + ... + 26163192.

It is an arithmetic number, because the mean of its divisors is an integer number (470936556).

Almost surely, 2^2668640433 is an apocalyptic number.

It is an amenable number.

2668640433 is a deficient number, since it is larger than the sum of its proper divisors (1098852015).

2668640433 is a wasteful number, since it uses less digits than its factorization.

2668640433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52326303.

The product of its (nonzero) digits is 497664, while the sum is 42.

The square root of 2668640433 is about 51658.8853247919. The cubic root of 2668640433 is about 1387.0645976096.

The spelling of 2668640433 in words is "two billion, six hundred sixty-eight million, six hundred forty thousand, four hundred thirty-three".