66378739422 has 8 divisors (see below), whose sum is σ = 132757478856. Its totient is φ = 22126246472.

The previous prime is 66378739409. The next prime is 66378739517. The reversal of 66378739422 is 22493787366.

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

66378739422 is an admirable number.

It is a super-2 number, since 2×66378739422² (a number of 22 digits) contains 22 as substring.

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, 5531561613 + ... + 5531561624.

It is an arithmetic number, because the mean of its divisors is an integer number (16594684857).

Almost surely, 2^66378739422 is an apocalyptic number.

66378739422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66378739422 is a wasteful number, since it uses less digits than its factorization.

66378739422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11063123242.

The product of its digits is 18289152, while the sum is 57.

The spelling of 66378739422 in words is "sixty-six billion, three hundred seventy-eight million, seven hundred thirty-nine thousand, four hundred twenty-two".