696662129221 has 2 divisors, whose sum is σ = 696662129222. Its totient is φ = 696662129220.

The previous prime is 696662129203. The next prime is 696662129227. The reversal of 696662129221 is 122921266696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 681143198596 + 15518930625 = 825314^2 + 124575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-696662129221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (696662129227) 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, 348331064610 + 348331064611.

It is an arithmetic number, because the mean of its divisors is an integer number (348331064611).

Almost surely, 2^696662129221 is an apocalyptic number.

It is an amenable number.

696662129221 is a deficient number, since it is larger than the sum of its proper divisors (1).

696662129221 is an equidigital number, since it uses as much as digits as its factorization.

696662129221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 52.

The spelling of 696662129221 in words is "six hundred ninety-six billion, six hundred sixty-two million, one hundred twenty-nine thousand, two hundred twenty-one".