66565007 has 2 divisors, whose sum is σ = 66565008. Its totient is φ = 66565006.

The previous prime is 66565003. The next prime is 66565043. The reversal of 66565007 is 70056566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66565007 - 2² = 66565003 is a prime.

It is a Chen prime.

It is equal to p_3927617 and since 66565007 and 3927617 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66565001) 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, 33282503 + 33282504.

It is an arithmetic number, because the mean of its divisors is an integer number (33282504).

Almost surely, 2^66565007 is an apocalyptic number.

66565007 is a deficient number, since it is larger than the sum of its proper divisors (1).

66565007 is an equidigital number, since it uses as much as digits as its factorization.

66565007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 66565007 is about 8158.7380764429. The cubic root of 66565007 is about 405.2739233108.

The spelling of 66565007 in words is "sixty-six million, five hundred sixty-five thousand, seven".