668519522 has 32 divisors (see below), whose sum is σ = 1162356480. Its totient is φ = 285169680.

The previous prime is 668519521. The next prime is 668519591. The reversal of 668519522 is 225915866.

668519522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (668519521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37253 + ... + 52199.

It is an arithmetic number, because the mean of its divisors is an integer number (36323640).

Almost surely, 2^668519522 is an apocalyptic number.

668519522 is a deficient number, since it is larger than the sum of its proper divisors (493836958).

668519522 is a wasteful number, since it uses less digits than its factorization.

668519522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15086.

The product of its digits is 259200, while the sum is 44.

The square root of 668519522 is about 25855.7444681061. The cubic root of 668519522 is about 874.3890252371.

The spelling of 668519522 in words is "six hundred sixty-eight million, five hundred nineteen thousand, five hundred twenty-two".