5221061665 has 8 divisors (see below), whose sum is σ = 6265774080. Its totient is φ = 4176515952.

The previous prime is 5221061597. The next prime is 5221061717. The reversal of 5221061665 is 5661601225.

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 5221061665 - 2⁷ = 5221061537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5221061665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42802 + ... + 110788.

It is an arithmetic number, because the mean of its divisors is an integer number (783221760).

Almost surely, 2^5221061665 is an apocalyptic number.

It is an amenable number.

5221061665 is a deficient number, since it is larger than the sum of its proper divisors (1044712415).

5221061665 is a wasteful number, since it uses less digits than its factorization.

5221061665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83351.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 5221061665 is about 72256.9143058296. The cubic root of 5221061665 is about 1734.8140903209.

The spelling of 5221061665 in words is "five billion, two hundred twenty-one million, sixty-one thousand, six hundred sixty-five".