1664200175207 has 4 divisors (see below), whose sum is σ = 1664204307360. Its totient is φ = 1664196043056.

The previous prime is 1664200175203. The next prime is 1664200175263. The reversal of 1664200175207 is 7025710024661.

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 1664200175207 - 2² = 1664200175203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664200175203) 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, 1387718 + ... + 2292195.

It is an arithmetic number, because the mean of its divisors is an integer number (416051076840).

Almost surely, 2^{1664200175207} is an apocalyptic number.

1664200175207 is a deficient number, since it is larger than the sum of its proper divisors (4132153).

1664200175207 is an equidigital number, since it uses as much as digits as its factorization.

1664200175207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4132152.

The product of its (nonzero) digits is 141120, while the sum is 41.

Adding to 1664200175207 its reverse (7025710024661), we get a palindrome (8689910199868).

The spelling of 1664200175207 in words is "one trillion, six hundred sixty-four billion, two hundred million, one hundred seventy-five thousand, two hundred seven".