6777557551 has 8 divisors (see below), whose sum is σ = 6837448464. Its totient is φ = 6717817920.

The previous prime is 6777557417. The next prime is 6777557557. The reversal of 6777557551 is 1557557776.

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 6777557551 - 2¹⁷ = 6777426479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6777557492 and 6777557501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6777557557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53136 + ... + 127978.

It is an arithmetic number, because the mean of its divisors is an integer number (854681058).

Almost surely, 2^6777557551 is an apocalyptic number.

6777557551 is a deficient number, since it is larger than the sum of its proper divisors (59890913).

6777557551 is a wasteful number, since it uses less digits than its factorization.

6777557551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75641.

The product of its digits is 9003750, while the sum is 55.

The square root of 6777557551 is about 82325.9227157522. The cubic root of 6777557551 is about 1892.4499597099.

The spelling of 6777557551 in words is "six billion, seven hundred seventy-seven million, five hundred fifty-seven thousand, five hundred fifty-one".