1664107005418 has 24 divisors (see below), whose sum is σ = 2954768515524. Its totient is φ = 698226714240.

The previous prime is 1664107005413. The next prime is 1664107005461. The reversal of 1664107005418 is 8145007014661.

It can be written as a sum of positive squares in 2 ways, for example, as 1536119796409 + 127987209009 = 1239403^2 + 357753^2 .

It is not an unprimeable number, because it can be changed into a prime (1664107005413) 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 11 ways as a sum of consecutive naturals, for example, 264476671 + ... + 264482962.

Almost surely, 2^{1664107005418} is an apocalyptic number.

1664107005418 is a deficient number, since it is larger than the sum of its proper divisors (1290661510106).

1664107005418 is a wasteful number, since it uses less digits than its factorization.

1664107005418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528959670 (or 528959659 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 1664107005418 in words is "one trillion, six hundred sixty-four billion, one hundred seven million, five thousand, four hundred eighteen".