66962628857 has 2 divisors, whose sum is σ = 66962628858. Its totient is φ = 66962628856.

The previous prime is 66962628847. The next prime is 66962628911. The reversal of 66962628857 is 75882626966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55707328576 + 11255300281 = 236024^2 + 106091^2 .

It is a cyclic number.

It is not a de Polignac number, because 66962628857 - 2¹⁰ = 66962627833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66962628793 and 66962628802.

It is not a weakly prime, because it can be changed into another prime (66962628847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33481314428 + 33481314429.

It is an arithmetic number, because the mean of its divisors is an integer number (33481314429).

Almost surely, 2^66962628857 is an apocalyptic number.

It is an amenable number.

66962628857 is a deficient number, since it is larger than the sum of its proper divisors (1).

66962628857 is an equidigital number, since it uses as much as digits as its factorization.

66962628857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104509440, while the sum is 65.

The spelling of 66962628857 in words is "sixty-six billion, nine hundred sixty-two million, six hundred twenty-eight thousand, eight hundred fifty-seven".