66147007 has 2 divisors, whose sum is σ = 66147008. Its totient is φ = 66147006.

The previous prime is 66146989. The next prime is 66147019. The reversal of 66147007 is 70074166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66147007 - 2¹⁵ = 66114239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66147007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66147077) 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, 33073503 + 33073504.

It is an arithmetic number, because the mean of its divisors is an integer number (33073504).

Almost surely, 2^66147007 is an apocalyptic number.

66147007 is a deficient number, since it is larger than the sum of its proper divisors (1).

66147007 is an equidigital number, since it uses as much as digits as its factorization.

66147007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 66147007 is about 8133.0810275073. The cubic root of 66147007 is about 404.4238253089.

The spelling of 66147007 in words is "sixty-six million, one hundred forty-seven thousand, seven".