6780479969 has 4 divisors (see below), whose sum is σ = 6780898560. Its totient is φ = 6780061380.

The previous prime is 6780479963. The next prime is 6780479989. The reversal of 6780479969 is 9699740876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6780479969 - 2¹² = 6780475873 is a prime.

It is a super-2 number, since 2×6780479969² = 91949817220020481922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6780479963) 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, 183977 + ... + 217734.

It is an arithmetic number, because the mean of its divisors is an integer number (1695224640).

Almost surely, 2^6780479969 is an apocalyptic number.

It is an amenable number.

6780479969 is a deficient number, since it is larger than the sum of its proper divisors (418591).

6780479969 is a wasteful number, since it uses less digits than its factorization.

6780479969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418590.

The product of its (nonzero) digits is 41150592, while the sum is 65.

The square root of 6780479969 is about 82343.6698781394. The cubic root of 6780479969 is about 1892.7219227325.

The spelling of 6780479969 in words is "six billion, seven hundred eighty million, four hundred seventy-nine thousand, nine hundred sixty-nine".