378444406566 has 8 divisors (see below), whose sum is σ = 756888813144. Its totient is φ = 126148135520.

The previous prime is 378444406531. The next prime is 378444406579. The reversal of 378444406566 is 665604444873.

It is a happy number.

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

378444406566 is an admirable number.

It is a super-2 number, since 2×378444406566² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31537033875 + ... + 31537033886.

It is an arithmetic number, because the mean of its divisors is an integer number (94611101643).

Almost surely, 2^378444406566 is an apocalyptic number.

378444406566 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.

378444406566 is a wasteful number, since it uses less digits than its factorization.

378444406566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63074067766.

The product of its (nonzero) digits is 46448640, while the sum is 57.

The spelling of 378444406566 in words is "three hundred seventy-eight billion, four hundred forty-four million, four hundred six thousand, five hundred sixty-six".