66622631297 has 2 divisors, whose sum is σ = 66622631298. Its totient is φ = 66622631296.

The previous prime is 66622631293. The next prime is 66622631351. The reversal of 66622631297 is 79213622666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65025510001 + 1597121296 = 255001^2 + 39964^2 .

It is a cyclic number.

It is not a de Polignac number, because 66622631297 - 2² = 66622631293 is a prime.

It is not a weakly prime, because it can be changed into another prime (66622631293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33311315648 + 33311315649.

It is an arithmetic number, because the mean of its divisors is an integer number (33311315649).

Almost surely, 2^66622631297 is an apocalyptic number.

It is an amenable number.

66622631297 is a deficient number, since it is larger than the sum of its proper divisors (1).

66622631297 is an equidigital number, since it uses as much as digits as its factorization.

66622631297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 50.

The spelling of 66622631297 in words is "sixty-six billion, six hundred twenty-two million, six hundred thirty-one thousand, two hundred ninety-seven".