2066660204646 has 16 divisors (see below), whose sum is σ = 4201079761008. Its totient is φ = 677593509600.

The previous prime is 2066660204629. The next prime is 2066660204647. The reversal of 2066660204646 is 6464020666602.

It is a junction number, because it is equal to n+sod(n) for n = 2066660204595 and 2066660204604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066660204647) 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, 2823305925 + ... + 2823306656.

It is an arithmetic number, because the mean of its divisors is an integer number (262567485063).

Almost surely, 2^{2066660204646} is an apocalyptic number.

2066660204646 is an abundant number, since it is smaller than the sum of its proper divisors (2134419556362).

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

2066660204646 is a wasteful number, since it uses less digits than its factorization.

2066660204646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5646612647.

The product of its (nonzero) digits is 2985984, while the sum is 48.

The spelling of 2066660204646 in words is "two trillion, sixty-six billion, six hundred sixty million, two hundred four thousand, six hundred forty-six".