668503780 has 24 divisors (see below), whose sum is σ = 1604409408. Its totient is φ = 229201248.

The previous prime is 668503751. The next prime is 668503789. The reversal of 668503780 is 87305866.

It is not an unprimeable number, because it can be changed into a prime (668503789) 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, 2387374 + ... + 2387653.

It is an arithmetic number, because the mean of its divisors is an integer number (66850392).

Almost surely, 2^668503780 is an apocalyptic number.

It is an amenable number.

668503780 is an abundant number, since it is smaller than the sum of its proper divisors (935905628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668503780 is a wasteful number, since it uses less digits than its factorization.

668503780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775043 (or 4775041 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 668503780 is about 25855.4400465357. The cubic root of 668503780 is about 874.3821619421.

The spelling of 668503780 in words is "six hundred sixty-eight million, five hundred three thousand, seven hundred eighty".