999976667 has 2 divisors, whose sum is σ = 999976668. Its totient is φ = 999976666.

The previous prime is 999976643. The next prime is 999976699. The reversal of 999976667 is 766679999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999976667 - 2⁶ = 999976603 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999976597 and 999976606.

It is not a weakly prime, because it can be changed into another prime (999970667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499988333 + 499988334.

It is an arithmetic number, because the mean of its divisors is an integer number (499988334).

Almost surely, 2^999976667 is an apocalyptic number.

999976667 is a deficient number, since it is larger than the sum of its proper divisors (1).

999976667 is an equidigital number, since it uses as much as digits as its factorization.

999976667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69441624, while the sum is 68.

The square root of 999976667 is about 31622.4076724085. The cubic root of 999976667 is about 999.9922222728.

The spelling of 999976667 in words is "nine hundred ninety-nine million, nine hundred seventy-six thousand, six hundred sixty-seven".