66305507 has 2 divisors, whose sum is σ = 66305508. Its totient is φ = 66305506.

The previous prime is 66305489. The next prime is 66305521. The reversal of 66305507 is 70550366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66305507 - 2²⁴ = 49528291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66304507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33152753 + 33152754.

It is an arithmetic number, because the mean of its divisors is an integer number (33152754).

Almost surely, 2^66305507 is an apocalyptic number.

66305507 is a deficient number, since it is larger than the sum of its proper divisors (1).

66305507 is an equidigital number, since it uses as much as digits as its factorization.

66305507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 66305507 is about 8142.8193520426. The cubic root of 66305507 is about 404.7465914626.

The spelling of 66305507 in words is "sixty-six million, three hundred five thousand, five hundred seven".