16667500009987 has 2 divisors, whose sum is σ = 16667500009988. Its totient is φ = 16667500009986.

The previous prime is 16667500009949. The next prime is 16667500010009. The reversal of 16667500009987 is 78990000576661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16667500009987 - 2³⁵ = 16633140271619 is a prime.

It is not a weakly prime, because it can be changed into another prime (16667500007987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8333750004993 + 8333750004994.

It is an arithmetic number, because the mean of its divisors is an integer number (8333750004994).

Almost surely, 2^{16667500009987} is an apocalyptic number.

16667500009987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16667500009987 is an equidigital number, since it uses as much as digits as its factorization.

16667500009987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34292160, while the sum is 64.

The spelling of 16667500009987 in words is "sixteen trillion, six hundred sixty-seven billion, five hundred million, nine thousand, nine hundred eighty-seven".