66740683 has 2 divisors, whose sum is σ = 66740684. Its totient is φ = 66740682.

The previous prime is 66740669. The next prime is 66740689. The reversal of 66740683 is 38604766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66740683 - 2²¹ = 64643531 is a prime.

It is not a weakly prime, because it can be changed into another prime (66740689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33370341 + 33370342.

It is an arithmetic number, because the mean of its divisors is an integer number (33370342).

Almost surely, 2^66740683 is an apocalyptic number.

66740683 is a deficient number, since it is larger than the sum of its proper divisors (1).

66740683 is an equidigital number, since it uses as much as digits as its factorization.

66740683 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 66740683 is about 8169.4971081456. The cubic root of 66740683 is about 405.6301383012.

It can be divided in two parts, 667406 and 83, that added together give a square (667489 = 817²).

The spelling of 66740683 in words is "sixty-six million, seven hundred forty thousand, six hundred eighty-three".