66040822519 has 8 divisors (see below), whose sum is σ = 75554932608. Its totient is φ = 56546639160.

The previous prime is 66040822511. The next prime is 66040822531. The reversal of 66040822519 is 91522804066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66040822519 - 2³ = 66040822511 is a prime.

It is a super-2 number, since 2×66040822519² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66040822511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4974577 + ... + 4987834.

It is an arithmetic number, because the mean of its divisors is an integer number (9444366576).

Almost surely, 2^66040822519 is an apocalyptic number.

66040822519 is a deficient number, since it is larger than the sum of its proper divisors (9514110089).

66040822519 is an equidigital number, since it uses as much as digits as its factorization.

66040822519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9963365.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 66040822519 in words is "sixty-six billion, forty million, eight hundred twenty-two thousand, five hundred nineteen".