30820781466 has 24 divisors (see below), whose sum is σ = 66879411924. Its totient is φ = 10258047360.

The previous prime is 30820781449. The next prime is 30820781473. The reversal of 30820781466 is 66418702803.

30820781466 is a `hidden beast` number, since 30 + 82 + 0 + 7 + 81 + 466 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30794985225 + 25796241 = 175485^2 + 5079^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1283311 + ... + 1307106.

Almost surely, 2^30820781466 is an apocalyptic number.

30820781466 is an abundant number, since it is smaller than the sum of its proper divisors (36058630458).

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

30820781466 is a wasteful number, since it uses less digits than its factorization.

30820781466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591086 (or 2591083 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 30820781466 in words is "thirty billion, eight hundred twenty million, seven hundred eighty-one thousand, four hundred sixty-six".