1819620330066 has 512 divisors, whose sum is σ = 5237793792000. Its totient is φ = 458404531200.

The previous prime is 1819620330053. The next prime is 1819620330079. The reversal of 1819620330066 is 6600330269181.

1819620330066 is a `hidden beast` number, since 1 + 8 + 19 + 620 + 3 + 3 + 0 + 0 + 6 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1819620330053) and next prime (1819620330079).

It is a super-2 number, since 2×1819620330066² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 5213811660 + ... + 5213812008.

It is an arithmetic number, because the mean of its divisors is an integer number (10230066000).

Almost surely, 2^{1819620330066} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1819620330066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2618896896000).

1819620330066 is an abundant number, since it is smaller than the sum of its proper divisors (3418173461934).

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

1819620330066 is a wasteful number, since it uses less digits than its factorization.

1819620330066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 1819620330066 in words is "one trillion, eight hundred nineteen billion, six hundred twenty million, three hundred thirty thousand, sixty-six".