9998667 has 16 divisors (see below), whose sum is σ = 16929280. Its totient is φ = 5713416.

The previous prime is 9998641. The next prime is 9998689. The reversal of 9998667 is 7668999.

It is not a de Polignac number, because 9998667 - 2⁶ = 9998603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9998867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26263 + ... + 26640.

It is an arithmetic number, because the mean of its divisors is an integer number (1058080).

Almost surely, 2^9998667 is an apocalyptic number.

9998667 is a deficient number, since it is larger than the sum of its proper divisors (6930613).

9998667 is a wasteful number, since it uses less digits than its factorization.

9998667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52919 (or 52913 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 9998667 is about 3162.0668873381. The cubic root of 9998667 is about 215.4338957063.

It can be divided in two parts, 9998 and 667, that multiplied together give a palindrome (6668666).

The spelling of 9998667 in words is "nine million, nine hundred ninety-eight thousand, six hundred sixty-seven".