1668550518 has 12 divisors (see below), whose sum is σ = 3615192828. Its totient is φ = 556183500.

The previous prime is 1668550487. The next prime is 1668550529. The reversal of 1668550518 is 8150558661.

1668550518 is a `hidden beast` number, since 1 + 6 + 6 + 85 + 50 + 518 = 666.

It is a super-2 number, since 2×1668550518² = 5568121662236136648, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46348608 + ... + 46348643.

It is an arithmetic number, because the mean of its divisors is an integer number (301266069).

Almost surely, 2^1668550518 is an apocalyptic number.

1668550518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1668550518 is an abundant number, since it is smaller than the sum of its proper divisors (1946642310).

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

1668550518 is a wasteful number, since it uses less digits than its factorization.

1668550518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92697259 (or 92697256 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The square root of 1668550518 is about 40847.8949029200. The cubic root of 1668550518 is about 1186.0776438413.

The spelling of 1668550518 in words is "one billion, six hundred sixty-eight million, five hundred fifty thousand, five hundred eighteen".