6979006991 has 8 divisors (see below), whose sum is σ = 8061313104. Its totient is φ = 5971342720.

The previous prime is 6979006973. The next prime is 6979007033. The reversal of 6979006991 is 1996009796.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6979006991 - 2¹⁰ = 6979005967 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 (6979006591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18660260 + ... + 18660633.

It is an arithmetic number, because the mean of its divisors is an integer number (1007664138).

Almost surely, 2^6979006991 is an apocalyptic number.

6979006991 is a deficient number, since it is larger than the sum of its proper divisors (1082306113).

6979006991 is a wasteful number, since it uses less digits than its factorization.

6979006991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37320921.

The product of its (nonzero) digits is 1653372, while the sum is 56.

The square root of 6979006991 is about 83540.4512257385. The cubic root of 6979006991 is about 1911.0169735644.

The spelling of 6979006991 in words is "six billion, nine hundred seventy-nine million, six thousand, nine hundred ninety-one".