5220620665 has 16 divisors (see below), whose sum is σ = 6776921088. Its totient is φ = 3837928896.

The previous prime is 5220620609. The next prime is 5220620731. The reversal of 5220620665 is 5660260225.

It is a cyclic number.

It is not a de Polignac number, because 5220620665 - 2¹¹ = 5220618617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5220620665.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165589 + ... + 194578.

It is an arithmetic number, because the mean of its divisors is an integer number (423557568).

Almost surely, 2^5220620665 is an apocalyptic number.

It is an amenable number.

5220620665 is a deficient number, since it is larger than the sum of its proper divisors (1556300423).

5220620665 is a wasteful number, since it uses less digits than its factorization.

5220620665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360408.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 5220620665 is about 72253.8626303120. The cubic root of 5220620665 is about 1734.7652449197.

The spelling of 5220620665 in words is "five billion, two hundred twenty million, six hundred twenty thousand, six hundred sixty-five".