491085066 has 32 divisors (see below), whose sum is σ = 993420288. Its totient is φ = 161831360.

The previous prime is 491085059. The next prime is 491085139. The reversal of 491085066 is 660580194.

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, 197020 + ... + 199496.

It is an arithmetic number, because the mean of its divisors is an integer number (31044384).

Almost surely, 2^491085066 is an apocalyptic number.

491085066 is an abundant number, since it is smaller than the sum of its proper divisors (502335222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491085066 is a wasteful number, since it uses less digits than its factorization.

491085066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 491085066 is about 22160.4392104489. The cubic root of 491085066 is about 788.9550174268.

The spelling of 491085066 in words is "four hundred ninety-one million, eighty-five thousand, sixty-six".