664581416350 has 48 divisors (see below), whose sum is σ = 1238782431600. Its totient is φ = 265260718080.

The previous prime is 664581416333. The next prime is 664581416351. The reversal of 664581416350 is 53614185466.

It is a junction number, because it is equal to n+sod(n) for n = 664581416294 and 664581416303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664581416351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125177496 + ... + 125182804.

It is an arithmetic number, because the mean of its divisors is an integer number (25807967325).

Almost surely, 2^664581416350 is an apocalyptic number.

664581416350 is a deficient number, since it is larger than the sum of its proper divisors (574201015250).

664581416350 is a wasteful number, since it uses less digits than its factorization.

664581416350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10237 (or 10232 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 664581416350 in words is "six hundred sixty-four billion, five hundred eighty-one million, four hundred sixteen thousand, three hundred fifty".