1669004640115 has 4 divisors (see below), whose sum is σ = 2002805568144. Its totient is φ = 1335203712088.

The previous prime is 1669004639999. The next prime is 1669004640119. The reversal of 1669004640115 is 5110464009661.

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

It is a cyclic number.

It is not a de Polignac number, because 1669004640115 - 2²⁹ = 1668467769203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1669004640119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166900464007 + ... + 166900464016.

It is an arithmetic number, because the mean of its divisors is an integer number (500701392036).

Almost surely, 2^{1669004640115} is an apocalyptic number.

1669004640115 is a deficient number, since it is larger than the sum of its proper divisors (333800928029).

1669004640115 is an equidigital number, since it uses as much as digits as its factorization.

1669004640115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333800928028.

The product of its (nonzero) digits is 155520, while the sum is 43.

Adding to 1669004640115 its reverse (5110464009661), we get a palindrome (6779468649776).

The spelling of 1669004640115 in words is "one trillion, six hundred sixty-nine billion, four million, six hundred forty thousand, one hundred fifteen".