999696667 has 2 divisors, whose sum is σ = 999696668. Its totient is φ = 999696666.

The previous prime is 999696641. The next prime is 999696701. The reversal of 999696667 is 766696999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999696667 - 2⁷ = 999696539 is a prime.

It is not a weakly prime, because it can be changed into another prime (999696367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499848333 + 499848334.

It is an arithmetic number, because the mean of its divisors is an integer number (499848334).

Almost surely, 2^999696667 is an apocalyptic number.

999696667 is a deficient number, since it is larger than the sum of its proper divisors (1).

999696667 is an equidigital number, since it uses as much as digits as its factorization.

999696667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59521392, while the sum is 67.

The square root of 999696667 is about 31617.9801220761. The cubic root of 999696667 is about 999.8988787748.

The spelling of 999696667 in words is "nine hundred ninety-nine million, six hundred ninety-six thousand, six hundred sixty-seven".