6777520247 has 2 divisors, whose sum is σ = 6777520248. Its totient is φ = 6777520246.

The previous prime is 6777520223. The next prime is 6777520279. The reversal of 6777520247 is 7420257776.

6777520247 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6777520247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6777520847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3388760123 + 3388760124.

It is an arithmetic number, because the mean of its divisors is an integer number (3388760124).

Almost surely, 2^6777520247 is an apocalyptic number.

6777520247 is a deficient number, since it is larger than the sum of its proper divisors (1).

6777520247 is an equidigital number, since it uses as much as digits as its factorization.

6777520247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152480, while the sum is 47.

The square root of 6777520247 is about 82325.6961525379. The cubic root of 6777520247 is about 1892.4464876586.

The spelling of 6777520247 in words is "six billion, seven hundred seventy-seven million, five hundred twenty thousand, two hundred forty-seven".