1667730878099 has 12 divisors (see below), whose sum is σ = 1974135345168. Its totient is φ = 1399494441840.

The previous prime is 1667730878053. The next prime is 1667730878113. The reversal of 1667730878099 is 9908780377661.

It is not a de Polignac number, because 1667730878099 - 2⁴⁰ = 568219250323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1667730878399) 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 11 ways as a sum of consecutive naturals, for example, 530109959 + ... + 530113104.

It is an arithmetic number, because the mean of its divisors is an integer number (164511278764).

Almost surely, 2^{1667730878099} is an apocalyptic number.

1667730878099 is a deficient number, since it is larger than the sum of its proper divisors (306404467069).

1667730878099 is a wasteful number, since it uses less digits than its factorization.

1667730878099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060223098 (or 1060223087 counting only the distinct ones).

The product of its (nonzero) digits is 192036096, while the sum is 71.

The spelling of 1667730878099 in words is "one trillion, six hundred sixty-seven billion, seven hundred thirty million, eight hundred seventy-eight thousand, ninety-nine".