6866742577 has 2 divisors, whose sum is σ = 6866742578. Its totient is φ = 6866742576.

The previous prime is 6866742521. The next prime is 6866742599. The reversal of 6866742577 is 7752476686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5788014241 + 1078728336 = 76079^2 + 32844^2 .

It is a cyclic number.

It is not a de Polignac number, because 6866742577 - 2¹⁵ = 6866709809 is a prime.

It is not a weakly prime, because it can be changed into another prime (6866743577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3433371288 + 3433371289.

It is an arithmetic number, because the mean of its divisors is an integer number (3433371289).

Almost surely, 2^6866742577 is an apocalyptic number.

It is an amenable number.

6866742577 is a deficient number, since it is larger than the sum of its proper divisors (1).

6866742577 is an equidigital number, since it uses as much as digits as its factorization.

6866742577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23708160, while the sum is 58.

The square root of 6866742577 is about 82865.8106639886. The cubic root of 6866742577 is about 1900.7146505540.

The spelling of 6866742577 in words is "six billion, eight hundred sixty-six million, seven hundred forty-two thousand, five hundred seventy-seven".