66634037 has 2 divisors, whose sum is σ = 66634038. Its totient is φ = 66634036.

The previous prime is 66634031. The next prime is 66634081. The reversal of 66634037 is 73043666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34269316 + 32364721 = 5854^2 + 5689^2 .

It is a cyclic number.

It is not a de Polignac number, because 66634037 - 2¹⁴ = 66617653 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66633988 and 66634006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66634031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33317018 + 33317019.

It is an arithmetic number, because the mean of its divisors is an integer number (33317019).

Almost surely, 2^66634037 is an apocalyptic number.

It is an amenable number.

66634037 is a deficient number, since it is larger than the sum of its proper divisors (1).

66634037 is an equidigital number, since it uses as much as digits as its factorization.

66634037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 66634037 is about 8162.9674138759. The cubic root of 66634037 is about 405.4139688346.

The spelling of 66634037 in words is "sixty-six million, six hundred thirty-four thousand, thirty-seven".