66716000537 has 2 divisors, whose sum is σ = 66716000538. Its totient is φ = 66716000536.

The previous prime is 66716000521. The next prime is 66716000543. The reversal of 66716000537 is 73500061766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66386614336 + 329386201 = 257656^2 + 18149^2 .

It is a cyclic number.

It is not a de Polignac number, because 66716000537 - 2⁴ = 66716000521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66716000494 and 66716000503.

It is not a weakly prime, because it can be changed into another prime (66716000237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33358000268 + 33358000269.

It is an arithmetic number, because the mean of its divisors is an integer number (33358000269).

Almost surely, 2^66716000537 is an apocalyptic number.

It is an amenable number.

66716000537 is a deficient number, since it is larger than the sum of its proper divisors (1).

66716000537 is an equidigital number, since it uses as much as digits as its factorization.

66716000537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 41.

The spelling of 66716000537 in words is "sixty-six billion, seven hundred sixteen million, five hundred thirty-seven", and thus it is an aban number.