669021400322 has 18 divisors (see below), whose sum is σ = 1103076924579. Its totient is φ = 304094852820.

The previous prime is 669021400321. The next prime is 669021400343. The reversal of 669021400322 is 223004120966.

It can be written as a sum of positive squares in only one way, i.e., 334510700161 + 334510700161 = 578369^2 + 578369^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=578369.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669021400321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12697829 + ... + 12750407.

Almost surely, 2^669021400322 is an apocalyptic number.

669021400322 is a deficient number, since it is larger than the sum of its proper divisors (434055524257).

669021400322 is an frugal number, since it uses more digits than its factorization.

669021400322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105182 (or 52592 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 669021400322 in words is "six hundred sixty-nine billion, twenty-one million, four hundred thousand, three hundred twenty-two".