66212750753 has 2 divisors, whose sum is σ = 66212750754. Its totient is φ = 66212750752.

The previous prime is 66212750749. The next prime is 66212750777. The reversal of 66212750753 is 35705721266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57892209664 + 8320541089 = 240608^2 + 91217^2 .

It is a cyclic number.

It is not a de Polignac number, because 66212750753 - 2² = 66212750749 is a prime.

It is a super-3 number, since 3×66212750753³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (66212750953) 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, 33106375376 + 33106375377.

It is an arithmetic number, because the mean of its divisors is an integer number (33106375377).

Almost surely, 2^66212750753 is an apocalyptic number.

It is an amenable number.

66212750753 is a deficient number, since it is larger than the sum of its proper divisors (1).

66212750753 is an equidigital number, since it uses as much as digits as its factorization.

66212750753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 44.

The spelling of 66212750753 in words is "sixty-six billion, two hundred twelve million, seven hundred fifty thousand, seven hundred fifty-three".