5220845661 has 8 divisors (see below), whose sum is σ = 6977280384. Its totient is φ = 3472487360.

The previous prime is 5220845621. The next prime is 5220845671. The reversal of 5220845661 is 1665480225.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5220845661 - 2⁷ = 5220845533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5220845621) 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 7 ways as a sum of consecutive naturals, for example, 2017596 + ... + 2020181.

It is an arithmetic number, because the mean of its divisors is an integer number (872160048).

Almost surely, 2^5220845661 is an apocalyptic number.

It is an amenable number.

5220845661 is a deficient number, since it is larger than the sum of its proper divisors (1756434723).

5220845661 is a wasteful number, since it uses less digits than its factorization.

5220845661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038211.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 5220845661 is about 72255.4195960414. The cubic root of 5220845661 is about 1734.7901659434.

The spelling of 5220845661 in words is "five billion, two hundred twenty million, eight hundred forty-five thousand, six hundred sixty-one".