66552719 has 2 divisors, whose sum is σ = 66552720. Its totient is φ = 66552718.

The previous prime is 66552701. The next prime is 66552749. The reversal of 66552719 is 91725566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66552719 - 2²⁰ = 65504143 is a prime.

It is a super-2 number, since 2×66552719² = 8858528812585922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_3926948 and since 66552719 and 3926948 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 (66552749) 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, 33276359 + 33276360.

It is an arithmetic number, because the mean of its divisors is an integer number (33276360).

Almost surely, 2^66552719 is an apocalyptic number.

66552719 is a deficient number, since it is larger than the sum of its proper divisors (1).

66552719 is an equidigital number, since it uses as much as digits as its factorization.

66552719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The square root of 66552719 is about 8157.9849840509. The cubic root of 66552719 is about 405.2489837183.

The spelling of 66552719 in words is "sixty-six million, five hundred fifty-two thousand, seven hundred nineteen".