9990667 has 2 divisors, whose sum is σ = 9990668. Its totient is φ = 9990666.

The previous prime is 9990661. The next prime is 9990677. The reversal of 9990667 is 7660999.

9990667 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9990667 - 2²³ = 1602059 is a prime.

It is not a weakly prime, because it can be changed into another prime (9990661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995333 + 4995334.

It is an arithmetic number, because the mean of its divisors is an integer number (4995334).

Almost surely, 2^9990667 is an apocalyptic number.

9990667 is a deficient number, since it is larger than the sum of its proper divisors (1).

9990667 is an equidigital number, since it uses as much as digits as its factorization.

9990667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 9990667 is about 3160.8016388252. The cubic root of 9990667 is about 215.3764236779.

The spelling of 9990667 in words is "nine million, nine hundred ninety thousand, six hundred sixty-seven".