4644240666 has 48 divisors (see below), whose sum is σ = 10329861024. Its totient is φ = 1390364352.

The previous prime is 4644240647. The next prime is 4644240697. The reversal of 4644240666 is 6660424464.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24376 + ... + 99411.

It is an arithmetic number, because the mean of its divisors is an integer number (215205438).

Almost surely, 2^4644240666 is an apocalyptic number.

4644240666 is an abundant number, since it is smaller than the sum of its proper divisors (5685620358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4644240666 is a wasteful number, since it uses less digits than its factorization.

4644240666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123855 (or 123842 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 42.

The square root of 4644240666 is about 68148.6659150419. The cubic root of 4644240666 is about 1668.4181497705.

The spelling of 4644240666 in words is "four billion, six hundred forty-four million, two hundred forty thousand, six hundred sixty-six".