66310537 has 2 divisors, whose sum is σ = 66310538. Its totient is φ = 66310536.

The previous prime is 66310529. The next prime is 66310567. The reversal of 66310537 is 73501366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52142841 + 14167696 = 7221^2 + 3764^2 .

It is a cyclic number.

It is not a de Polignac number, because 66310537 - 2³ = 66310529 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66310499 and 66310508.

It is not a weakly prime, because it can be changed into another prime (66310507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33155268 + 33155269.

It is an arithmetic number, because the mean of its divisors is an integer number (33155269).

Almost surely, 2^66310537 is an apocalyptic number.

It is an amenable number.

66310537 is a deficient number, since it is larger than the sum of its proper divisors (1).

66310537 is an equidigital number, since it uses as much as digits as its factorization.

66310537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 66310537 is about 8143.1282072678. The cubic root of 66310537 is about 404.7568260267.

The spelling of 66310537 in words is "sixty-six million, three hundred ten thousand, five hundred thirty-seven".