1666350018 has 24 divisors (see below), whose sum is σ = 3694390128. Its totient is φ = 542532312.

The previous prime is 1666350017. The next prime is 1666350031. The reversal of 1666350018 is 8100536661.

It is a happy number.

1666350018 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1666350017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1075680 + ... + 1077227.

It is an arithmetic number, because the mean of its divisors is an integer number (153932922).

Almost surely, 2^1666350018 is an apocalyptic number.

1666350018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1666350018 is an abundant number, since it is smaller than the sum of its proper divisors (2028040110).

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

1666350018 is a wasteful number, since it uses less digits than its factorization.

1666350018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152958 (or 2152955 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1666350018 is about 40820.9507238624. The cubic root of 1666350018 is about 1185.5560110395.

Adding to 1666350018 its reverse (8100536661), we get a palindrome (9766886679).

The spelling of 1666350018 in words is "one billion, six hundred sixty-six million, three hundred fifty thousand, eighteen".