7998065555 has 16 divisors (see below), whose sum is σ = 9642414144. Its totient is φ = 6368699520.

The previous prime is 7998065549. The next prime is 7998065567. The reversal of 7998065555 is 5555608997.

It is not a de Polignac number, because 7998065555 - 2²⁸ = 7729630099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7998065494 and 7998065503.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1005002 + ... + 1012928.

It is an arithmetic number, because the mean of its divisors is an integer number (602650884).

Almost surely, 2^7998065555 is an apocalyptic number.

7998065555 is a deficient number, since it is larger than the sum of its proper divisors (1644348589).

7998065555 is a wasteful number, since it uses less digits than its factorization.

7998065555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8846.

The product of its (nonzero) digits is 17010000, while the sum is 59.

The square root of 7998065555 is about 89431.9045699017. The cubic root of 7998065555 is about 1999.8387832549.

The spelling of 7998065555 in words is "seven billion, nine hundred ninety-eight million, sixty-five thousand, five hundred fifty-five".