66421899684382 has 8 divisors (see below), whose sum is σ = 108690381301752. Its totient is φ = 30191772583800.

The previous prime is 66421899684341. The next prime is 66421899684397. The reversal of 66421899684382 is 28348699812466.

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

It is a junction number, because it is equal to n+sod(n) for n = 66421899684299 and 66421899684308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1509588629169 + ... + 1509588629212.

It is an arithmetic number, because the mean of its divisors is an integer number (13586297662719).

Almost surely, 2^{66421899684382} is an apocalyptic number.

66421899684382 is a deficient number, since it is larger than the sum of its proper divisors (42268481617370).

66421899684382 is a wasteful number, since it uses less digits than its factorization.

66421899684382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019177258394.

The product of its digits is 1719926784, while the sum is 76.

The spelling of 66421899684382 in words is "sixty-six trillion, four hundred twenty-one billion, eight hundred ninety-nine million, six hundred eighty-four thousand, three hundred eighty-two".