381684566 has 8 divisors (see below), whose sum is σ = 573575160. Its totient is φ = 190492848.

The previous prime is 381684553. The next prime is 381684571. The reversal of 381684566 is 665486183.

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

It is a self number, because there is not a number n which added to its sum of digits gives 381684566.

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, 173351 + ... + 175538.

It is an arithmetic number, because the mean of its divisors is an integer number (71696895).

Almost surely, 2^381684566 is an apocalyptic number.

381684566 is a deficient number, since it is larger than the sum of its proper divisors (191890594).

381684566 is a wasteful number, since it uses less digits than its factorization.

381684566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349438.

The product of its digits is 829440, while the sum is 47.

The square root of 381684566 is about 19536.7491154491. The cubic root of 381684566 is about 725.3843802400.

The spelling of 381684566 in words is "three hundred eighty-one million, six hundred eighty-four thousand, five hundred sixty-six".