1666300020 has 192 divisors, whose sum is σ = 5876140032. Its totient is φ = 342720000.

The previous prime is 1666300001. The next prime is 1666300037. The reversal of 1666300020 is 200036661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 464835 + ... + 468405.

It is an arithmetic number, because the mean of its divisors is an integer number (30604896).

Almost surely, 2^1666300020 is an apocalyptic number.

1666300020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666300020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2938070016).

1666300020 is an abundant number, since it is smaller than the sum of its proper divisors (4209840012).

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

1666300020 is a wasteful number, since it uses less digits than its factorization.

1666300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702 (or 3700 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1666300020 is about 40820.3383131497. The cubic root of 1666300020 is about 1185.5441535823.

Adding to 1666300020 its reverse (200036661), we get a palindrome (1866336681).

The spelling of 1666300020 in words is "one billion, six hundred sixty-six million, three hundred thousand, twenty".