6755550781 has 16 divisors (see below), whose sum is σ = 7890554880. Its totient is φ = 5663205360.

The previous prime is 6755550727. The next prime is 6755550793. The reversal of 6755550781 is 1870555576.

It is a cyclic number.

It is not a de Polignac number, because 6755550781 - 2⁷ = 6755550653 is a prime.

It is a super-2 number, since 2×6755550781² = 91274932709339419922, 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 (6755550701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506326 + ... + 519496.

It is an arithmetic number, because the mean of its divisors is an integer number (493159680).

Almost surely, 2^6755550781 is an apocalyptic number.

It is an amenable number.

6755550781 is a deficient number, since it is larger than the sum of its proper divisors (1135004099).

6755550781 is a wasteful number, since it uses less digits than its factorization.

6755550781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14784.

The product of its (nonzero) digits is 1470000, while the sum is 49.

The square root of 6755550781 is about 82192.1576611784. The cubic root of 6755550781 is about 1890.3994733372.

It can be divided in two parts, 67555 and 50781, that added together give a square (118336 = 344²).

The spelling of 6755550781 in words is "six billion, seven hundred fifty-five million, five hundred fifty thousand, seven hundred eighty-one".