387666319794 has 128 divisors (see below), whose sum is σ = 855967875840. Its totient is φ = 116328960000.

The previous prime is 387666319759. The next prime is 387666319849. The reversal of 387666319794 is 497913666783.

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 63 ways as a sum of consecutive naturals, for example, 215249694 + ... + 215251494.

It is an arithmetic number, because the mean of its divisors is an integer number (6687249030).

Almost surely, 2^387666319794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387666319794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (427983937920).

387666319794 is an abundant number, since it is smaller than the sum of its proper divisors (468301556046).

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

387666319794 is a wasteful number, since it uses less digits than its factorization.

387666319794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

The product of its digits is 246903552, while the sum is 69.

The spelling of 387666319794 in words is "three hundred eighty-seven billion, six hundred sixty-six million, three hundred nineteen thousand, seven hundred ninety-four".