66532519 has 2 divisors, whose sum is σ = 66532520. Its totient is φ = 66532518.

The previous prime is 66532511. The next prime is 66532597. The reversal of 66532519 is 91523566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66532519 - 2³ = 66532511 is a prime.

It is a super-2 number, since 2×66532519² = 8853152168970722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66532511) 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, 33266259 + 33266260.

It is an arithmetic number, because the mean of its divisors is an integer number (33266260).

Almost surely, 2^66532519 is an apocalyptic number.

66532519 is a deficient number, since it is larger than the sum of its proper divisors (1).

66532519 is an equidigital number, since it uses as much as digits as its factorization.

66532519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 37.

The square root of 66532519 is about 8156.7468392736. The cubic root of 66532519 is about 405.2079793440.

The spelling of 66532519 in words is "sixty-six million, five hundred thirty-two thousand, five hundred nineteen".