77716 has 6 divisors (see below), whose sum is σ = 136010. Its totient is φ = 38856.

The previous prime is 77713. The next prime is 77719. The reversal of 77716 is 61777.

It is an interprime number because it is at equal distance from previous prime (77713) and next prime (77719).

It can be written as a sum of positive squares in only one way, i.e., 41616 + 36100 = 204^2 + 190^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9711 + ... + 9718.

2⁷⁷⁷¹⁶ is an apocalyptic number.

It is an amenable number.

77716 is a deficient number, since it is larger than the sum of its proper divisors (58294).

77716 is a wasteful number, since it uses less digits than its factorization.

77716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19433 (or 19431 counting only the distinct ones).

The product of its digits is 2058, while the sum is 28.

The square root of 77716 is about 278.7758956581. The cubic root of 77716 is about 42.6746675534.

It can be divided in two parts, 7771 and 6, that added together give a palindrome (7777).

The spelling of 77716 in words is "seventy-seven thousand, seven hundred sixteen".