491327866 has 8 divisors (see below), whose sum is σ = 760765824. Its totient is φ = 237739260.

The previous prime is 491327857. The next prime is 491327867. The reversal of 491327866 is 668723194.

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

It is a super-2 number, since 2×491327866² = 482806143816227912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491327867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3962260 + ... + 3962383.

It is an arithmetic number, because the mean of its divisors is an integer number (95095728).

Almost surely, 2^491327866 is an apocalyptic number.

491327866 is a deficient number, since it is larger than the sum of its proper divisors (269437958).

491327866 is a wasteful number, since it uses less digits than its factorization.

491327866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7924676.

The product of its digits is 435456, while the sum is 46.

The square root of 491327866 is about 22165.9167642577. The cubic root of 491327866 is about 789.0850198306.

The spelling of 491327866 in words is "four hundred ninety-one million, three hundred twenty-seven thousand, eight hundred sixty-six".