66212750953 has 2 divisors, whose sum is σ = 66212750954. Its totient is φ = 66212750952.

The previous prime is 66212750939. The next prime is 66212750959. The reversal of 66212750953 is 35905721266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44458565904 + 21754185049 = 210852^2 + 147493^2 .

It is a cyclic number.

It is not a de Polignac number, because 66212750953 - 2²⁹ = 65675880041 is a prime.

It is not a weakly prime, because it can be changed into another prime (66212750959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33106375476 + 33106375477.

It is an arithmetic number, because the mean of its divisors is an integer number (33106375477).

Almost surely, 2^66212750953 is an apocalyptic number.

It is an amenable number.

66212750953 is a deficient number, since it is larger than the sum of its proper divisors (1).

66212750953 is an equidigital number, since it uses as much as digits as its factorization.

66212750953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 66212750953 in words is "sixty-six billion, two hundred twelve million, seven hundred fifty thousand, nine hundred fifty-three".