1306066433646 has 64 divisors (see below), whose sum is σ = 2913267409920. Its totient is φ = 387582599040.

The previous prime is 1306066433597. The next prime is 1306066433653. The reversal of 1306066433646 is 6463346606031.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1306066433595 and 1306066433604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1743781 + ... + 2377583.

It is an arithmetic number, because the mean of its divisors is an integer number (45519803280).

Almost surely, 2^{1306066433646} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1306066433646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1456633704960).

1306066433646 is an abundant number, since it is smaller than the sum of its proper divisors (1607200976274).

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

1306066433646 is a wasteful number, since it uses less digits than its factorization.

1306066433646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634761.

The product of its (nonzero) digits is 3359232, while the sum is 48.

The spelling of 1306066433646 in words is "one trillion, three hundred six billion, sixty-six million, four hundred thirty-three thousand, six hundred forty-six".