669320012 has 6 divisors (see below), whose sum is σ = 1171310028. Its totient is φ = 334660004.

The previous prime is 669319969. The next prime is 669320023. The reversal of 669320012 is 210023966.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83664998 + ... + 83665005.

It is an arithmetic number, because the mean of its divisors is an integer number (195218338).

Almost surely, 2^669320012 is an apocalyptic number.

It is an amenable number.

669320012 is a deficient number, since it is larger than the sum of its proper divisors (501990016).

669320012 is a wasteful number, since it uses less digits than its factorization.

669320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167330007 (or 167330005 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 669320012 is about 25871.2197625083. The cubic root of 669320012 is about 874.7378858974.

Adding to 669320012 its reverse (210023966), we get a palindrome (879343978).

The spelling of 669320012 in words is "six hundred sixty-nine million, three hundred twenty thousand, twelve".