3320530781 has 4 divisors (see below), whose sum is σ = 3320664000. Its totient is φ = 3320397564.

The previous prime is 3320530771. The next prime is 3320530783. The reversal of 3320530781 is 1870350233.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3320530781 - 2²⁶ = 3253421917 is a prime.

It is a super-2 number, since 2×3320530781² = 22051849335136939922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3320530783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16811 + ... + 83208.

It is an arithmetic number, because the mean of its divisors is an integer number (830166000).

Almost surely, 2^3320530781 is an apocalyptic number.

It is an amenable number.

3320530781 is a deficient number, since it is larger than the sum of its proper divisors (133219).

3320530781 is a wasteful number, since it uses less digits than its factorization.

3320530781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133218.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 3320530781 is about 57624.0468988425. The cubic root of 3320530781 is about 1491.8866812342.

The spelling of 3320530781 in words is "three billion, three hundred twenty million, five hundred thirty thousand, seven hundred eighty-one".