66536713 has 2 divisors, whose sum is σ = 66536714. Its totient is φ = 66536712.

The previous prime is 66536711. The next prime is 66536737. The reversal of 66536713 is 31763566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66536649 + 64 = 8157^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 66536713 - 2¹ = 66536711 is a prime.

Together with 66536711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66536711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33268356 + 33268357.

It is an arithmetic number, because the mean of its divisors is an integer number (33268357).

Almost surely, 2^66536713 is an apocalyptic number.

It is an amenable number.

66536713 is a deficient number, since it is larger than the sum of its proper divisors (1).

66536713 is an equidigital number, since it uses as much as digits as its factorization.

66536713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 37.

The square root of 66536713 is about 8157.0039230100. The cubic root of 66536713 is about 405.2164935091.

It can be divided in two parts, 6653 and 6713, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 66536713 in words is "sixty-six million, five hundred thirty-six thousand, seven hundred thirteen".