65726537 has 2 divisors, whose sum is σ = 65726538. Its totient is φ = 65726536.

The previous prime is 65726533. The next prime is 65726561. The reversal of 65726537 is 73562756.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63664441 + 2062096 = 7979^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 65726537 - 2² = 65726533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65726494 and 65726503.

It is not a weakly prime, because it can be changed into another prime (65726533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32863268 + 32863269.

It is an arithmetic number, because the mean of its divisors is an integer number (32863269).

Almost surely, 2^65726537 is an apocalyptic number.

It is an amenable number.

65726537 is a deficient number, since it is larger than the sum of its proper divisors (1).

65726537 is an equidigital number, since it uses as much as digits as its factorization.

65726537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 41.

The square root of 65726537 is about 8107.1904504582. The cubic root of 65726537 is about 403.5650831398.

The spelling of 65726537 in words is "sixty-five million, seven hundred twenty-six thousand, five hundred thirty-seven".