7677730681 has 4 divisors (see below), whose sum is σ = 7678009764. Its totient is φ = 7677451600.

The previous prime is 7677730633. The next prime is 7677730741. The reversal of 7677730681 is 1860377767.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1860377767 = 131 ⋅14201357.

It can be written as a sum of positive squares in 2 ways, for example, as 2755305081 + 4922425600 = 52491^2 + 70160^2 .

It is a cyclic number.

It is not a de Polignac number, because 7677730681 - 2¹⁷ = 7677599609 is a prime.

It is a super-2 number, since 2×7677730681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7677730381) 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 3 ways as a sum of consecutive naturals, for example, 93130 + ... + 155011.

It is an arithmetic number, because the mean of its divisors is an integer number (1919502441).

Almost surely, 2^7677730681 is an apocalyptic number.

It is an amenable number.

7677730681 is a deficient number, since it is larger than the sum of its proper divisors (279083).

7677730681 is a wasteful number, since it uses less digits than its factorization.

7677730681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279082.

The product of its (nonzero) digits is 2074464, while the sum is 52.

The square root of 7677730681 is about 87622.6607733410. The cubic root of 7677730681 is about 1972.7753131711.

The spelling of 7677730681 in words is "seven billion, six hundred seventy-seven million, seven hundred thirty thousand, six hundred eighty-one".