391037066 has 8 divisors (see below), whose sum is σ = 670349280. Its totient is φ = 167587308.

The previous prime is 391037063. The next prime is 391037089. The reversal of 391037066 is 660730193.

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

It is not an unprimeable number, because it can be changed into a prime (391037063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13965596 + ... + 13965623.

It is an arithmetic number, because the mean of its divisors is an integer number (83793660).

Almost surely, 2^391037066 is an apocalyptic number.

391037066 is a deficient number, since it is larger than the sum of its proper divisors (279312214).

391037066 is a wasteful number, since it uses less digits than its factorization.

391037066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27931228.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 391037066 is about 19774.6571651698. The cubic root of 391037066 is about 731.2613870582.

The spelling of 391037066 in words is "three hundred ninety-one million, thirty-seven thousand, sixty-six".