669671201 has 2 divisors, whose sum is σ = 669671202. Its totient is φ = 669671200.

The previous prime is 669671183. The next prime is 669671209. The reversal of 669671201 is 102176966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409010176 + 260661025 = 20224^2 + 16145^2 .

It is a cyclic number.

It is not a de Polignac number, because 669671201 - 2⁶ = 669671137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (669671209) 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 as a sum of consecutive naturals, namely, 334835600 + 334835601.

It is an arithmetic number, because the mean of its divisors is an integer number (334835601).

Almost surely, 2^669671201 is an apocalyptic number.

It is an amenable number.

669671201 is a deficient number, since it is larger than the sum of its proper divisors (1).

669671201 is an equidigital number, since it uses as much as digits as its factorization.

669671201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 669671201 is about 25878.0061248930. The cubic root of 669671201 is about 874.8908494051.

The spelling of 669671201 in words is "six hundred sixty-nine million, six hundred seventy-one thousand, two hundred one".