66047369 has 2 divisors, whose sum is σ = 66047370. Its totient is φ = 66047368.

The previous prime is 66047353. The next prime is 66047417. The reversal of 66047369 is 96374066.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54213769 + 11833600 = 7363^2 + 3440^2 .

It is a cyclic number.

It is not a de Polignac number, because 66047369 - 2⁴ = 66047353 is a prime.

It is a super-2 number, since 2×66047369² = 8724509903644322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66047309) 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, 33023684 + 33023685.

It is an arithmetic number, because the mean of its divisors is an integer number (33023685).

Almost surely, 2^66047369 is an apocalyptic number.

It is an amenable number.

66047369 is a deficient number, since it is larger than the sum of its proper divisors (1).

66047369 is an equidigital number, since it uses as much as digits as its factorization.

66047369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 66047369 is about 8126.9532421443. The cubic root of 66047369 is about 404.2206605065.

The spelling of 66047369 in words is "sixty-six million, forty-seven thousand, three hundred sixty-nine".