1668366850 has 24 divisors (see below), whose sum is σ = 3105152820. Its totient is φ = 666918720.

The previous prime is 1668366841. The next prime is 1668366851. The reversal of 1668366850 is 586638661.

It can be written as a sum of positive squares in 6 ways, for example, as 514881481 + 1153485369 = 22691^2 + 33963^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1668366794 and 1668366803.

It is not an unprimeable number, because it can be changed into a prime (1668366851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74796 + ... + 94504.

Almost surely, 2^1668366850 is an apocalyptic number.

1668366850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668366850 is a deficient number, since it is larger than the sum of its proper divisors (1436785970).

1668366850 is a wasteful number, since it uses less digits than its factorization.

1668366850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21414 (or 21409 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 1668366850 is about 40845.6466468582. The cubic root of 1668366850 is about 1186.0341225335.

The spelling of 1668366850 in words is "one billion, six hundred sixty-eight million, three hundred sixty-six thousand, eight hundred fifty".