66768252953 has 2 divisors, whose sum is σ = 66768252954. Its totient is φ = 66768252952.

The previous prime is 66768252899. The next prime is 66768252973. The reversal of 66768252953 is 35925286766.

66768252953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60166202944 + 6602050009 = 245288^2 + 81253^2 .

It is a cyclic number.

It is not a de Polignac number, because 66768252953 - 2²⁸ = 66499817497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66768252892 and 66768252901.

It is not a weakly prime, because it can be changed into another prime (66768252973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33384126476 + 33384126477.

It is an arithmetic number, because the mean of its divisors is an integer number (33384126477).

Almost surely, 2^66768252953 is an apocalyptic number.

It is an amenable number.

66768252953 is a deficient number, since it is larger than the sum of its proper divisors (1).

66768252953 is an equidigital number, since it uses as much as digits as its factorization.

66768252953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32659200, while the sum is 59.

The spelling of 66768252953 in words is "sixty-six billion, seven hundred sixty-eight million, two hundred fifty-two thousand, nine hundred fifty-three".