491769066 has 32 divisors (see below), whose sum is σ = 1021305600. Its totient is φ = 157671360.

The previous prime is 491769053. The next prime is 491769097. The reversal of 491769066 is 660967194.

It is a Curzon number.

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, 41940 + ... + 52368.

It is an arithmetic number, because the mean of its divisors is an integer number (31915800).

Almost surely, 2^491769066 is an apocalyptic number.

491769066 is an abundant number, since it is smaller than the sum of its proper divisors (529536534).

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

491769066 is a wasteful number, since it uses less digits than its factorization.

491769066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10734.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 491769066 is about 22175.8667474351. The cubic root of 491769066 is about 789.3211419658.

The spelling of 491769066 in words is "four hundred ninety-one million, seven hundred sixty-nine thousand, sixty-six".