344205641666 has 4 divisors (see below), whose sum is σ = 516308462502. Its totient is φ = 172102820832.

The previous prime is 344205641651. The next prime is 344205641671. The reversal of 344205641666 is 666146502443.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 207597785641 + 136607856025 = 455629^2 + 369605^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 344205641666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86051410415 + ... + 86051410418.

Almost surely, 2^344205641666 is an apocalyptic number.

344205641666 is a deficient number, since it is larger than the sum of its proper divisors (172102820836).

344205641666 is a wasteful number, since it uses less digits than its factorization.

344205641666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172102820835.

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 344205641666 in words is "three hundred forty-four billion, two hundred five million, six hundred forty-one thousand, six hundred sixty-six".