66737137 has 2 divisors, whose sum is σ = 66737138. Its totient is φ = 66737136.

The previous prime is 66737131. The next prime is 66737171. The reversal of 66737137 is 73173766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65221776 + 1515361 = 8076^2 + 1231^2 .

It is a cyclic number.

It is not a de Polignac number, because 66737137 - 2¹¹ = 66735089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66737137.

It is not a weakly prime, because it can be changed into another prime (66737131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368568 + 33368569.

It is an arithmetic number, because the mean of its divisors is an integer number (33368569).

Almost surely, 2^66737137 is an apocalyptic number.

It is an amenable number.

66737137 is a deficient number, since it is larger than the sum of its proper divisors (1).

66737137 is an equidigital number, since it uses as much as digits as its factorization.

66737137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 40.

The square root of 66737137 is about 8169.2800784402. The cubic root of 66737137 is about 405.6229543274.

The spelling of 66737137 in words is "sixty-six million, seven hundred thirty-seven thousand, one hundred thirty-seven".