9997900667 has 2 divisors, whose sum is σ = 9997900668. Its totient is φ = 9997900666.

The previous prime is 9997900603. The next prime is 9997900687. The reversal of 9997900667 is 7660097999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9997900667 - 2⁶ = 9997900603 is a prime.

It is not a weakly prime, because it can be changed into another prime (9997900687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998950333 + 4998950334.

It is an arithmetic number, because the mean of its divisors is an integer number (4998950334).

Almost surely, 2^9997900667 is an apocalyptic number.

9997900667 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997900667 is an equidigital number, since it uses as much as digits as its factorization.

9997900667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11573604, while the sum is 62.

The square root of 9997900667 is about 99989.5027840423. The cubic root of 9997900667 is about 2154.2839169526.

The spelling of 9997900667 in words is "nine billion, nine hundred ninety-seven million, nine hundred thousand, six hundred sixty-seven".