6981448669 has 4 divisors (see below), whose sum is σ = 7518483196. Its totient is φ = 6444414144.

The previous prime is 6981448657. The next prime is 6981448679. The reversal of 6981448669 is 9668441896.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2046386169 + 4935062500 = 45237^2 + 70250^2 .

It is a cyclic number.

It is not a de Polignac number, because 6981448669 - 2⁷ = 6981448541 is a prime.

It is a super-2 number, since 2×6981448669² = 97481251035763743122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6981448619) 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, 268517244 + ... + 268517269.

It is an arithmetic number, because the mean of its divisors is an integer number (1879620799).

Almost surely, 2^6981448669 is an apocalyptic number.

It is an amenable number.

6981448669 is a deficient number, since it is larger than the sum of its proper divisors (537034527).

6981448669 is a wasteful number, since it uses less digits than its factorization.

6981448669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537034526.

The product of its digits is 17915904, while the sum is 61.

The square root of 6981448669 is about 83555.0636945482. The cubic root of 6981448669 is about 1911.2398106171.

The spelling of 6981448669 in words is "six billion, nine hundred eighty-one million, four hundred forty-eight thousand, six hundred sixty-nine".