76680649 has 2 divisors, whose sum is σ = 76680650. Its totient is φ = 76680648.

The previous prime is 76680647. The next prime is 76680661. The reversal of 76680649 is 94608667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42341049 + 34339600 = 6507^2 + 5860^2 .

It is a cyclic number.

It is not a de Polignac number, because 76680649 - 2¹ = 76680647 is a prime.

It is a super-2 number, since 2×76680649² = 11759843862122402, which contains 22 as substring.

Together with 76680647, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 76680599 and 76680608.

It is not a weakly prime, because it can be changed into another prime (76680647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38340324 + 38340325.

It is an arithmetic number, because the mean of its divisors is an integer number (38340325).

Almost surely, 2^76680649 is an apocalyptic number.

It is an amenable number.

76680649 is a deficient number, since it is larger than the sum of its proper divisors (1).

76680649 is an equidigital number, since it uses as much as digits as its factorization.

76680649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 76680649 is about 8756.7487688068. The cubic root of 76680649 is about 424.8431236464.

The spelling of 76680649 in words is "seventy-six million, six hundred eighty thousand, six hundred forty-nine".