1006991999999 has 4 divisors (see below), whose sum is σ = 1008755559240. Its totient is φ = 1005228440760.

The previous prime is 1006991999971. The next prime is 1006992000017. The reversal of 1006991999999 is 9999991996001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1006991999999 - 2²⁴ = 1006975222783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006991999939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881778764 + ... + 881779905.

It is an arithmetic number, because the mean of its divisors is an integer number (252188889810).

Almost surely, 2^{1006991999999} is an apocalyptic number.

1006991999999 is a deficient number, since it is larger than the sum of its proper divisors (1763559241).

1006991999999 is an equidigital number, since it uses as much as digits as its factorization.

1006991999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763559240.

The product of its (nonzero) digits is 258280326, while the sum is 80.

The spelling of 1006991999999 in words is "one trillion, six billion, nine hundred ninety-one million, nine hundred ninety-nine thousand, nine hundred ninety-nine".