998576666 has 16 divisors (see below), whose sum is σ = 1503640320. Its totient is φ = 497368080.

The previous prime is 998576653. The next prime is 998576723. The reversal of 998576666 is 666675899.

It is a junction number, because it is equal to n+sod(n) for n = 998576599 and 998576608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960575 + ... + 961613.

It is an arithmetic number, because the mean of its divisors is an integer number (93977520).

Almost surely, 2^998576666 is an apocalyptic number.

998576666 is a deficient number, since it is larger than the sum of its proper divisors (505063654).

998576666 is a wasteful number, since it uses less digits than its factorization.

With its successor (998576667) it forms an eRAP, since the sums of their prime factors are consecutive (2429 and 2430).

998576666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429.

The product of its digits is 29393280, while the sum is 62.

The square root of 998576666 is about 31600.2637014314. The cubic root of 998576666 is about 999.5253300574.

The spelling of 998576666 in words is "nine hundred ninety-eight million, five hundred seventy-six thousand, six hundred sixty-six".