66448429919 has 8 divisors (see below), whose sum is σ = 67597470192. Its totient is φ = 65307686400.

The previous prime is 66448429871. The next prime is 66448429963. The reversal of 66448429919 is 91992484466.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66448429919 is a prime.

It is a super-2 number, since 2×66448429919² (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 (66448429969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2058032 + ... + 2090069.

It is an arithmetic number, because the mean of its divisors is an integer number (8449683774).

Almost surely, 2^66448429919 is an apocalyptic number.

66448429919 is a deficient number, since it is larger than the sum of its proper divisors (1149040273).

66448429919 is a wasteful number, since it uses less digits than its factorization.

66448429919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148377.

The product of its digits is 26873856, while the sum is 62.

The spelling of 66448429919 in words is "sixty-six billion, four hundred forty-eight million, four hundred twenty-nine thousand, nine hundred nineteen".