20243360666 has 8 divisors (see below), whose sum is σ = 30365675604. Its totient is φ = 10121468800.

The previous prime is 20243360663. The next prime is 20243360689. The reversal of 20243360666 is 66606334202.

It can be written as a sum of positive squares in 2 ways, for example, as 19967103025 + 276257641 = 141305^2 + 16621^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20243360663) 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, 77066 + ... + 215466.

Almost surely, 2^20243360666 is an apocalyptic number.

20243360666 is a deficient number, since it is larger than the sum of its proper divisors (10122314938).

20243360666 is a wasteful number, since it uses less digits than its factorization.

20243360666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211536.

The product of its (nonzero) digits is 186624, while the sum is 38.

Adding to 20243360666 its reverse (66606334202), we get a palindrome (86849694868).

The spelling of 20243360666 in words is "twenty billion, two hundred forty-three million, three hundred sixty thousand, six hundred sixty-six".