65005555 has 8 divisors (see below), whose sum is σ = 82112400. Its totient is φ = 49267296.

The previous prime is 65005553. The next prime is 65005579. The reversal of 65005555 is 55550056.

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 65005555 - 2¹ = 65005553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65005553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342040 + ... + 342229.

It is an arithmetic number, because the mean of its divisors is an integer number (10264050).

Almost surely, 2^65005555 is an apocalyptic number.

65005555 is a deficient number, since it is larger than the sum of its proper divisors (17106845).

65005555 is a wasteful number, since it uses less digits than its factorization.

65005555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684293.

The product of its (nonzero) digits is 18750, while the sum is 31.

The square root of 65005555 is about 8062.6022474137. The cubic root of 65005555 is about 402.0840294463.

The spelling of 65005555 in words is "sixty-five million, five thousand, five hundred fifty-five".