671111385 has 16 divisors (see below), whose sum is σ = 1227175296. Its totient is φ = 306793728.

The previous prime is 671111333. The next prime is 671111401. The reversal of 671111385 is 583111176.

It is not a de Polignac number, because 671111385 - 2¹¹ = 671109337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3195664 + ... + 3195873.

It is an arithmetic number, because the mean of its divisors is an integer number (76698456).

Almost surely, 2^671111385 is an apocalyptic number.

It is an amenable number.

671111385 is a deficient number, since it is larger than the sum of its proper divisors (556063911).

671111385 is a wasteful number, since it uses less digits than its factorization.

671111385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391552.

The product of its digits is 5040, while the sum is 33.

The square root of 671111385 is about 25905.8175898774. The cubic root of 671111385 is about 875.5175756906.

The spelling of 671111385 in words is "six hundred seventy-one million, one hundred eleven thousand, three hundred eighty-five".