52820120665 has 16 divisors (see below), whose sum is σ = 68265223488. Its totient is φ = 39002556096.

The previous prime is 52820120527. The next prime is 52820120687. The reversal of 52820120665 is 56602102825.

It is a cyclic number.

It is not a de Polignac number, because 52820120665 - 2²⁵ = 52786566233 is a prime.

It is a Duffinian number.

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, 1112094 + ... + 1158616.

It is an arithmetic number, because the mean of its divisors is an integer number (4266576468).

Almost surely, 2^52820120665 is an apocalyptic number.

It is an amenable number.

52820120665 is a deficient number, since it is larger than the sum of its proper divisors (15445102823).

52820120665 is a wasteful number, since it uses less digits than its factorization.

52820120665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64008.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 52820120665 in words is "fifty-two billion, eight hundred twenty million, one hundred twenty thousand, six hundred sixty-five".