320663400366 has 8 divisors (see below), whose sum is σ = 641326800744. Its totient is φ = 106887800120.

The previous prime is 320663400341. The next prime is 320663400413. The reversal of 320663400366 is 663004366023.

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

320663400366 is an admirable number.

It is a congruent 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, 26721950025 + ... + 26721950036.

It is an arithmetic number, because the mean of its divisors is an integer number (80165850093).

Almost surely, 2^320663400366 is an apocalyptic number.

320663400366 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.

320663400366 is a wasteful number, since it uses less digits than its factorization.

320663400366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53443900066.

The product of its (nonzero) digits is 279936, while the sum is 39.

Adding to 320663400366 its reverse (663004366023), we get a palindrome (983667766389).

The spelling of 320663400366 in words is "three hundred twenty billion, six hundred sixty-three million, four hundred thousand, three hundred sixty-six".