66648295157 has 2 divisors, whose sum is σ = 66648295158. Its totient is φ = 66648295156.

The previous prime is 66648295121. The next prime is 66648295163. The reversal of 66648295157 is 75159284666.

66648295157 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., 41122161796 + 25526133361 = 202786^2 + 159769^2 .

It is a cyclic number.

It is not a de Polignac number, because 66648295157 - 2⁸ = 66648294901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66648295096 and 66648295105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66648295177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33324147578 + 33324147579.

It is an arithmetic number, because the mean of its divisors is an integer number (33324147579).

Almost surely, 2^66648295157 is an apocalyptic number.

It is an amenable number.

66648295157 is a deficient number, since it is larger than the sum of its proper divisors (1).

66648295157 is an equidigital number, since it uses as much as digits as its factorization.

66648295157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 59.

The spelling of 66648295157 in words is "sixty-six billion, six hundred forty-eight million, two hundred ninety-five thousand, one hundred fifty-seven".