76650649 has 2 divisors, whose sum is σ = 76650650. Its totient is φ = 76650648.

The previous prime is 76650647. The next prime is 76650659. The reversal of 76650649 is 94605667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63920025 + 12730624 = 7995^2 + 3568^2 .

It is a cyclic number.

It is not a de Polignac number, because 76650649 - 2¹ = 76650647 is a prime.

Together with 76650647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (76650641) 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, 38325324 + 38325325.

It is an arithmetic number, because the mean of its divisors is an integer number (38325325).

Almost surely, 2^76650649 is an apocalyptic number.

It is an amenable number.

76650649 is a deficient number, since it is larger than the sum of its proper divisors (1).

76650649 is an equidigital number, since it uses as much as digits as its factorization.

76650649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 76650649 is about 8755.0356367065. The cubic root of 76650649 is about 424.7877122035.

It can be divided in two parts, 766 and 50649, that added together give a palindrome (51415).

The spelling of 76650649 in words is "seventy-six million, six hundred fifty thousand, six hundred forty-nine".