998000666955 has 32 divisors (see below), whose sum is σ = 1777089830400. Its totient is φ = 531407095776.

The previous prime is 998000666947. The next prime is 998000667017. The reversal of 998000666955 is 559666000899.

It is not a de Polignac number, because 998000666955 - 2³ = 998000666947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 998000666892 and 998000666901.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5887839 + ... + 6054968.

It is an arithmetic number, because the mean of its divisors is an integer number (55534057200).

Almost surely, 2^998000666955 is an apocalyptic number.

998000666955 is a deficient number, since it is larger than the sum of its proper divisors (779089163445).

998000666955 is a wasteful number, since it uses less digits than its factorization.

998000666955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11943440 (or 11943434 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 63.

The spelling of 998000666955 in words is "nine hundred ninety-eight billion, six hundred sixty-six thousand, nine hundred fifty-five".