1668500001667 has 8 divisors (see below), whose sum is σ = 1670693543936. Its totient is φ = 1666306647432.

The previous prime is 1668500001661. The next prime is 1668500001683. The reversal of 1668500001667 is 7661000058661.

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 1668500001667 - 2²³ = 1668491613059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668500001661) 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, 30935998 + ... + 30989884.

It is an arithmetic number, because the mean of its divisors is an integer number (208836692992).

Almost surely, 2^{1668500001667} is an apocalyptic number.

1668500001667 is a deficient number, since it is larger than the sum of its proper divisors (2193542269).

1668500001667 is an equidigital number, since it uses as much as digits as its factorization.

1668500001667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94017.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 1668500001667 in words is "one trillion, six hundred sixty-eight billion, five hundred million, one thousand, six hundred sixty-seven".