2309805497666 has 16 divisors (see below), whose sum is σ = 3467204602560. Its totient is φ = 1154070918000.

The previous prime is 2309805497651. The next prime is 2309805497677. The reversal of 2309805497666 is 6667945089032.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16673960 + ... + 16811916.

It is an arithmetic number, because the mean of its divisors is an integer number (216700287660).

Almost surely, 2^{2309805497666} is an apocalyptic number.

2309805497666 is a deficient number, since it is larger than the sum of its proper divisors (1157399104894).

2309805497666 is a wasteful number, since it uses less digits than its factorization.

2309805497666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143929.

The product of its (nonzero) digits is 117573120, while the sum is 65.

The spelling of 2309805497666 in words is "two trillion, three hundred nine billion, eight hundred five million, four hundred ninety-seven thousand, six hundred sixty-six".