6899497942 has 16 divisors (see below), whose sum is σ = 10441415232. Its totient is φ = 3419159040.

The previous prime is 6899497931. The next prime is 6899497973. The reversal of 6899497942 is 2497949986.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71628 + ... + 137584.

It is an arithmetic number, because the mean of its divisors is an integer number (652588452).

Almost surely, 2^6899497942 is an apocalyptic number.

6899497942 is a deficient number, since it is larger than the sum of its proper divisors (3541917290).

6899497942 is a wasteful number, since it uses less digits than its factorization.

6899497942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66423.

The product of its digits is 70543872, while the sum is 67.

The square root of 6899497942 is about 83063.2165401750. The cubic root of 6899497942 is about 1903.7320865870.

The spelling of 6899497942 in words is "six billion, eight hundred ninety-nine million, four hundred ninety-seven thousand, nine hundred forty-two".