5518666698 has 64 divisors (see below), whose sum is σ = 12210147840. Its totient is φ = 1656148032.

The previous prime is 5518666693. The next prime is 5518666729. The reversal of 5518666698 is 8966668155.

It is a happy number.

It is a super-2 number, since 2×5518666698² = 60911364247228446408, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5518666693) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166161 + ... + 196587.

It is an arithmetic number, because the mean of its divisors is an integer number (190783560).

Almost surely, 2^5518666698 is an apocalyptic number.

5518666698 is an abundant number, since it is smaller than the sum of its proper divisors (6691481142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5518666698 is a wasteful number, since it uses less digits than its factorization.

5518666698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30531.

The product of its digits is 18662400, while the sum is 60.

The square root of 5518666698 is about 74287.7291213024. The cubic root of 5518666698 is about 1767.1688807802.

The spelling of 5518666698 in words is "five billion, five hundred eighteen million, six hundred sixty-six thousand, six hundred ninety-eight".