77657716 has 12 divisors (see below), whose sum is σ = 136003140. Its totient is φ = 38799680.

The previous prime is 77657707. The next prime is 77657719. The reversal of 77657716 is 61775677.

It can be written as a sum of positive squares in 2 ways, for example, as 31472100 + 46185616 = 5610^2 + 6796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77657719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631 + ... + 12478.

It is an arithmetic number, because the mean of its divisors is an integer number (11333595).

Almost surely, 2^77657716 is an apocalyptic number.

It is an amenable number.

77657716 is a deficient number, since it is larger than the sum of its proper divisors (58345424).

77657716 is a wasteful number, since it uses less digits than its factorization.

77657716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14594 (or 14592 counting only the distinct ones).

The product of its digits is 432180, while the sum is 46.

The square root of 77657716 is about 8812.3615450116. The cubic root of 77657716 is about 426.6399676761.

The spelling of 77657716 in words is "seventy-seven million, six hundred fifty-seven thousand, seven hundred sixteen".