634866066 has 16 divisors (see below), whose sum is σ = 1410813600. Its totient is φ = 211622004.

The previous prime is 634866053. The next prime is 634866107. The reversal of 634866066 is 660668436.

634866066 is a `hidden beast` number, since 6 + 34 + 8 + 6 + 606 + 6 = 666.

634866066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5878336 + ... + 5878443.

It is an arithmetic number, because the mean of its divisors is an integer number (88175850).

Almost surely, 2^634866066 is an apocalyptic number.

634866066 is an abundant number, since it is smaller than the sum of its proper divisors (775947534).

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

634866066 is a wasteful number, since it uses less digits than its factorization.

634866066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11756790 (or 11756784 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The square root of 634866066 is about 25196.5486922316. The cubic root of 634866066 is about 859.4633690214.

The spelling of 634866066 in words is "six hundred thirty-four million, eight hundred sixty-six thousand, sixty-six".