491081066 has 8 divisors (see below), whose sum is σ = 841853280. Its totient is φ = 210463308.

The previous prime is 491081053. The next prime is 491081077. The reversal of 491081066 is 660180194.

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

It is a super-2 number, since 2×491081066² = 482321226767392712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17538596 + ... + 17538623.

It is an arithmetic number, because the mean of its divisors is an integer number (105231660).

Almost surely, 2^491081066 is an apocalyptic number.

491081066 is a deficient number, since it is larger than the sum of its proper divisors (350772214).

491081066 is a wasteful number, since it uses less digits than its factorization.

491081066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35077228.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 491081066 is about 22160.3489593463. The cubic root of 491081066 is about 788.9528753480.

The spelling of 491081066 in words is "four hundred ninety-one million, eighty-one thousand, sixty-six".