1667766688379 has 8 divisors (see below), whose sum is σ = 1882119147120. Its totient is φ = 1463870447200.

The previous prime is 1667766688339. The next prime is 1667766688403. The reversal of 1667766688379 is 9738866677661.

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

It is a cyclic number.

It is not a de Polignac number, because 1667766688379 - 2²⁸ = 1667498252923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1667766688309) by changing a digit.

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, 2614054052 + ... + 2614054689.

It is an arithmetic number, because the mean of its divisors is an integer number (235264893390).

Almost surely, 2^{1667766688379} is an apocalyptic number.

1667766688379 is a deficient number, since it is larger than the sum of its proper divisors (214352458741).

1667766688379 is a wasteful number, since it uses less digits than its factorization.

1667766688379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5228108781.

The product of its digits is 4608866304, while the sum is 80.

The spelling of 1667766688379 in words is "one trillion, six hundred sixty-seven billion, seven hundred sixty-six million, six hundred eighty-eight thousand, three hundred seventy-nine".