664786803066 has 8 divisors (see below), whose sum is σ = 1329573606144. Its totient is φ = 221595601020.

The previous prime is 664786803059. The next prime is 664786803077. The reversal of 664786803066 is 660308687466.

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

664786803066 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55398900250 + ... + 55398900261.

It is an arithmetic number, because the mean of its divisors is an integer number (166196700768).

Almost surely, 2^664786803066 is an apocalyptic number.

664786803066 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.

664786803066 is a wasteful number, since it uses less digits than its factorization.

664786803066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110797800516.

The product of its (nonzero) digits is 41803776, while the sum is 60.

The spelling of 664786803066 in words is "six hundred sixty-four billion, seven hundred eighty-six million, eight hundred three thousand, sixty-six".