634643066 has 8 divisors (see below), whose sum is σ = 963434304. Its totient is φ = 313498300.

The previous prime is 634643033. The next prime is 634643077. The reversal of 634643066 is 660346436.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1911410 + ... + 1911741.

It is an arithmetic number, because the mean of its divisors is an integer number (120429288).

Almost surely, 2^634643066 is an apocalyptic number.

634643066 is a deficient number, since it is larger than the sum of its proper divisors (328791238).

634643066 is a wasteful number, since it uses less digits than its factorization.

634643066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823236.

The product of its (nonzero) digits is 186624, while the sum is 38.

The square root of 634643066 is about 25192.1230943325. The cubic root of 634643066 is about 859.3627269141.

The spelling of 634643066 in words is "six hundred thirty-four million, six hundred forty-three thousand, sixty-six".