2664622643 has 4 divisors (see below), whose sum is σ = 2804865960. Its totient is φ = 2524379328.

The previous prime is 2664622637. The next prime is 2664622663. The reversal of 2664622643 is 3462264662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3462264662 = 2 ⋅1731132331.

It is a cyclic number.

It is not a de Polignac number, because 2664622643 - 2¹⁸ = 2664360499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2664622643.

It is not an unprimeable number, because it can be changed into a prime (2664622663) 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, 70121630 + ... + 70121667.

It is an arithmetic number, because the mean of its divisors is an integer number (701216490).

Almost surely, 2^2664622643 is an apocalyptic number.

2664622643 is a deficient number, since it is larger than the sum of its proper divisors (140243317).

2664622643 is a wasteful number, since it uses less digits than its factorization.

2664622643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140243316.

The product of its digits is 497664, while the sum is 41.

The square root of 2664622643 is about 51619.9829813998. The cubic root of 2664622643 is about 1386.3681464214.

The spelling of 2664622643 in words is "two billion, six hundred sixty-four million, six hundred twenty-two thousand, six hundred forty-three".