66764303 has 2 divisors, whose sum is σ = 66764304. Its totient is φ = 66764302.

The previous prime is 66764279. The next prime is 66764323. The reversal of 66764303 is 30346766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66764303 - 2¹⁸ = 66502159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66764323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33382151 + 33382152.

It is an arithmetic number, because the mean of its divisors is an integer number (33382152).

Almost surely, 2^66764303 is an apocalyptic number.

66764303 is a deficient number, since it is larger than the sum of its proper divisors (1).

66764303 is an equidigital number, since it uses as much as digits as its factorization.

66764303 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 66764303 is about 8170.9426016831. The cubic root of 66764303 is about 405.6779844494.

The spelling of 66764303 in words is "sixty-six million, seven hundred sixty-four thousand, three hundred three".