66751337 has 2 divisors, whose sum is σ = 66751338. Its totient is φ = 66751336.

The previous prime is 66751331. The next prime is 66751343. The reversal of 66751337 is 73315766.

It is a balanced prime because it is at equal distance from previous prime (66751331) and next prime (66751343).

It can be written as a sum of positive squares in only one way, i.e., 53348416 + 13402921 = 7304^2 + 3661^2 .

It is a cyclic number.

It is not a de Polignac number, because 66751337 - 2⁸ = 66751081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66751337.

It is not a weakly prime, because it can be changed into another prime (66751331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33375668 + 33375669.

It is an arithmetic number, because the mean of its divisors is an integer number (33375669).

Almost surely, 2^66751337 is an apocalyptic number.

It is an amenable number.

66751337 is a deficient number, since it is larger than the sum of its proper divisors (1).

66751337 is an equidigital number, since it uses as much as digits as its factorization.

66751337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 38.

The square root of 66751337 is about 8170.1491418456. The cubic root of 66751337 is about 405.6517211067.

The spelling of 66751337 in words is "sixty-six million, seven hundred fifty-one thousand, three hundred thirty-seven".