665223652750 has 16 divisors (see below), whose sum is σ = 1245298678416. Its totient is φ = 266089461000.

The previous prime is 665223652739. The next prime is 665223652757. The reversal of 665223652750 is 57256322566.

It is a junction number, because it is equal to n+sod(n) for n = 665223652694 and 665223652703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665223652757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1330447056 + ... + 1330447555.

It is an arithmetic number, because the mean of its divisors is an integer number (77831167401).

Almost surely, 2^665223652750 is an apocalyptic number.

665223652750 is a deficient number, since it is larger than the sum of its proper divisors (580075025666).

665223652750 is a wasteful number, since it uses less digits than its factorization.

665223652750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660894628 (or 2660894618 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 49.

The spelling of 665223652750 in words is "six hundred sixty-five billion, two hundred twenty-three million, six hundred fifty-two thousand, seven hundred fifty".