9966998 has 8 divisors (see below), whose sum is σ = 15829992. Its totient is φ = 4690336.

The previous prime is 9966997. The next prime is 9967003. The reversal of 9966998 is 8996699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9966997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146540 + ... + 146607.

It is an arithmetic number, because the mean of its divisors is an integer number (1978749).

Almost surely, 2^9966998 is an apocalyptic number.

9966998 is a deficient number, since it is larger than the sum of its proper divisors (5862994).

9966998 is a wasteful number, since it uses less digits than its factorization.

9966998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293166.

The product of its digits is 1889568, while the sum is 56.

The square root of 9966998 is about 3157.0552735104. The cubic root of 9966998 is about 215.2062056271.

Subtracting from 9966998 its reverse (8996699), we obtain a cube (970299 = 99³).

The spelling of 9966998 in words is "nine million, nine hundred sixty-six thousand, nine hundred ninety-eight".