66604461119 has 4 divisors (see below), whose sum is σ = 76119384144. Its totient is φ = 57089538096.

The previous prime is 66604461023. The next prime is 66604461137. The reversal of 66604461119 is 91116440666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91116440666 = 2 ⋅45558220333.

It is a cyclic number.

It is not a de Polignac number, because 66604461119 - 2²⁸ = 66336025663 is a prime.

It is a super-2 number, since 2×66604461119² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66604461119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66604461149) 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 3 ways as a sum of consecutive naturals, for example, 4757461502 + ... + 4757461515.

It is an arithmetic number, because the mean of its divisors is an integer number (19029846036).

Almost surely, 2^66604461119 is an apocalyptic number.

66604461119 is a deficient number, since it is larger than the sum of its proper divisors (9514923025).

66604461119 is an equidigital number, since it uses as much as digits as its factorization.

66604461119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9514923024.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 66604461119 in words is "sixty-six billion, six hundred four million, four hundred sixty-one thousand, one hundred nineteen".