1666776641234 has 16 divisors (see below), whose sum is σ = 2539046567616. Its totient is φ = 820443135600.

The previous prime is 1666776641149. The next prime is 1666776641261. The reversal of 1666776641234 is 4321466776661.

It is an unprimeable number.

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, 3619502 + ... + 4053929.

It is an arithmetic number, because the mean of its divisors is an integer number (158690410476).

Almost surely, 2^{1666776641234} is an apocalyptic number.

1666776641234 is a deficient number, since it is larger than the sum of its proper divisors (872269926382).

1666776641234 is a wasteful number, since it uses less digits than its factorization.

1666776641234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7675121.

The product of its digits is 36578304, while the sum is 59.

The spelling of 1666776641234 in words is "one trillion, six hundred sixty-six billion, seven hundred seventy-six million, six hundred forty-one thousand, two hundred thirty-four".