66536737 has 2 divisors, whose sum is σ = 66536738. Its totient is φ = 66536736.

The previous prime is 66536713. The next prime is 66536747. The reversal of 66536737 is 73763566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60699681 + 5837056 = 7791^2 + 2416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66536737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66536693 and 66536702.

It is not a weakly prime, because it can be changed into another prime (66536747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33268368 + 33268369.

It is an arithmetic number, because the mean of its divisors is an integer number (33268369).

Almost surely, 2^66536737 is an apocalyptic number.

It is an amenable number.

66536737 is a deficient number, since it is larger than the sum of its proper divisors (1).

66536737 is an equidigital number, since it uses as much as digits as its factorization.

66536737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 43.

The square root of 66536737 is about 8157.0053941382. The cubic root of 66536737 is about 405.2165422300.

The spelling of 66536737 in words is "sixty-six million, five hundred thirty-six thousand, seven hundred thirty-seven".