664666040226 has 8 divisors (see below), whose sum is σ = 1329332080464. Its totient is φ = 221555346740.

The previous prime is 664666040189. The next prime is 664666040231. The reversal of 664666040226 is 622040666466.

664666040226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

664666040226 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55388836680 + ... + 55388836691.

It is an arithmetic number, because the mean of its divisors is an integer number (166166510058).

Almost surely, 2^664666040226 is an apocalyptic number.

664666040226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

664666040226 is a wasteful number, since it uses less digits than its factorization.

664666040226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110777673376.

The product of its (nonzero) digits is 2985984, while the sum is 48.

The spelling of 664666040226 in words is "six hundred sixty-four billion, six hundred sixty-six million, forty thousand, two hundred twenty-six".