6988235661 has 16 divisors (see below), whose sum is σ = 11294118720. Its totient is φ = 4235294160.

The previous prime is 6988235651. The next prime is 6988235669. The reversal of 6988235661 is 1665328896.

It is a happy number.

It is not a de Polignac number, because 6988235661 - 2⁷ = 6988235533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6988235598 and 6988235607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6988235669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11764410 + ... + 11765003.

It is an arithmetic number, because the mean of its divisors is an integer number (705882420).

Almost surely, 2^6988235661 is an apocalyptic number.

It is an amenable number.

6988235661 is a deficient number, since it is larger than the sum of its proper divisors (4305883059).

6988235661 is a wasteful number, since it uses less digits than its factorization.

6988235661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23529433 (or 23529427 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 6988235661 is about 83595.6677166945. The cubic root of 6988235661 is about 1911.8589451629.

It can be divided in two parts, 6988235 and 661, that added together give a palindrome (6988896).

The spelling of 6988235661 in words is "six billion, nine hundred eighty-eight million, two hundred thirty-five thousand, six hundred sixty-one".