634326666 has 16 divisors (see below), whose sum is σ = 1335424800. Its totient is φ = 200313648.

The previous prime is 634326653. The next prime is 634326673. The reversal of 634326666 is 666623436.

634326666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 2782021 + ... + 2782248.

It is an arithmetic number, because the mean of its divisors is an integer number (83464050).

Almost surely, 2^634326666 is an apocalyptic number.

634326666 is an abundant number, since it is smaller than the sum of its proper divisors (701098134).

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

634326666 is a wasteful number, since it uses less digits than its factorization.

634326666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5564293.

The product of its digits is 559872, while the sum is 42.

The square root of 634326666 is about 25185.8425707777. The cubic root of 634326666 is about 859.2198919993.

The spelling of 634326666 in words is "six hundred thirty-four million, three hundred twenty-six thousand, six hundred sixty-six".