669126197 has 2 divisors, whose sum is σ = 669126198. Its totient is φ = 669126196.

The previous prime is 669126131. The next prime is 669126203. The reversal of 669126197 is 791621966.

669126197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396248836 + 272877361 = 19906^2 + 16519^2 .

It is a cyclic number.

It is not a de Polignac number, because 669126197 - 2¹² = 669122101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669126127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334563098 + 334563099.

It is an arithmetic number, because the mean of its divisors is an integer number (334563099).

Almost surely, 2^669126197 is an apocalyptic number.

It is an amenable number.

669126197 is a deficient number, since it is larger than the sum of its proper divisors (1).

669126197 is an equidigital number, since it uses as much as digits as its factorization.

669126197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 47.

The square root of 669126197 is about 25867.4737266707. The cubic root of 669126197 is about 874.6534451280.

The spelling of 669126197 in words is "six hundred sixty-nine million, one hundred twenty-six thousand, one hundred ninety-seven".