391667066 has 8 divisors (see below), whose sum is σ = 671429280. Its totient is φ = 167857308.

The previous prime is 391667057. The next prime is 391667071. The reversal of 391667066 is 660766193.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13988096 + ... + 13988123.

It is an arithmetic number, because the mean of its divisors is an integer number (83928660).

Almost surely, 2^391667066 is an apocalyptic number.

391667066 is a deficient number, since it is larger than the sum of its proper divisors (279762214).

391667066 is a wasteful number, since it uses less digits than its factorization.

391667066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27976228.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 391667066 is about 19790.5802340406. The cubic root of 391667066 is about 731.6538882016.

The spelling of 391667066 in words is "three hundred ninety-one million, six hundred sixty-seven thousand, sixty-six".