664822111202 has 6 divisors (see below), whose sum is σ = 997234896459. Its totient is φ = 332410479050.

The previous prime is 664822111199. The next prime is 664822111321. The reversal of 664822111202 is 202111228466.

It can be written as a sum of positive squares in only one way, i.e., 332411055601 + 332411055601 = 576551^2 + 576551^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=576551.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 864827 + ... + 1441377.

Almost surely, 2^664822111202 is an apocalyptic number.

664822111202 is a deficient number, since it is larger than the sum of its proper divisors (332412785257).

664822111202 is an frugal number, since it uses more digits than its factorization.

664822111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153104 (or 576553 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

Adding to 664822111202 its reverse (202111228466), we get a palindrome (866933339668).

The spelling of 664822111202 in words is "six hundred sixty-four billion, eight hundred twenty-two million, one hundred eleven thousand, two hundred two".