66273787157 has 2 divisors, whose sum is σ = 66273787158. Its totient is φ = 66273787156.

The previous prime is 66273787103. The next prime is 66273787163. The reversal of 66273787157 is 75178737266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53338364401 + 12935422756 = 230951^2 + 113734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66273787157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66273787096 and 66273787105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66273787187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33136893578 + 33136893579.

It is an arithmetic number, because the mean of its divisors is an integer number (33136893579).

Almost surely, 2^66273787157 is an apocalyptic number.

It is an amenable number.

66273787157 is a deficient number, since it is larger than the sum of its proper divisors (1).

66273787157 is an equidigital number, since it uses as much as digits as its factorization.

66273787157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20744640, while the sum is 59.

The spelling of 66273787157 in words is "sixty-six billion, two hundred seventy-three million, seven hundred eighty-seven thousand, one hundred fifty-seven".