6780655061 has 4 divisors (see below), whose sum is σ = 6840660972. Its totient is φ = 6720649152.

The previous prime is 6780655051. The next prime is 6780655081. The reversal of 6780655061 is 1605560876.

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 3350210161 + 3430444900 = 57881^2 + 58570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6780655061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6780655031) 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, 30002786 + ... + 30003011.

It is an arithmetic number, because the mean of its divisors is an integer number (1710165243).

Almost surely, 2^6780655061 is an apocalyptic number.

It is an amenable number.

6780655061 is a deficient number, since it is larger than the sum of its proper divisors (60005911).

6780655061 is a wasteful number, since it uses less digits than its factorization.

6780655061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60005910.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 6780655061 is about 82344.7330495400. The cubic root of 6780655061 is about 1892.7382144806.

The spelling of 6780655061 in words is "six billion, seven hundred eighty million, six hundred fifty-five thousand, sixty-one".