66036523310957 has 2 divisors, whose sum is σ = 66036523310958. Its totient is φ = 66036523310956.

The previous prime is 66036523310951. The next prime is 66036523310977. The reversal of 66036523310957 is 75901332563066.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60687044655721 + 5349478655236 = 7790189^2 + 2312894^2 .

It is a cyclic number.

It is not a de Polignac number, because 66036523310957 - 2³² = 66032228343661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66036523310951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33018261655478 + 33018261655479.

It is an arithmetic number, because the mean of its divisors is an integer number (33018261655479).

Almost surely, 2^{66036523310957} is an apocalyptic number.

It is an amenable number.

66036523310957 is a deficient number, since it is larger than the sum of its proper divisors (1).

66036523310957 is an equidigital number, since it uses as much as digits as its factorization.

66036523310957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18370800, while the sum is 56.

The spelling of 66036523310957 in words is "sixty-six trillion, thirty-six billion, five hundred twenty-three million, three hundred ten thousand, nine hundred fifty-seven".