381341666 has 16 divisors (see below), whose sum is σ = 602955360. Its totient is φ = 180384480.

The previous prime is 381341659. The next prime is 381341699. The reversal of 381341666 is 666143183.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22325 + ... + 35511.

It is an arithmetic number, because the mean of its divisors is an integer number (37684710).

Almost surely, 2^381341666 is an apocalyptic number.

381341666 is a deficient number, since it is larger than the sum of its proper divisors (221613694).

381341666 is a wasteful number, since it uses less digits than its factorization.

381341666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13969.

The product of its digits is 62208, while the sum is 38.

The square root of 381341666 is about 19527.9713744157. The cubic root of 381341666 is about 725.1670901443.

The spelling of 381341666 in words is "three hundred eighty-one million, three hundred forty-one thousand, six hundred sixty-six".