76686977 has 8 divisors (see below), whose sum is σ = 79543272. Its totient is φ = 73872000.

The previous prime is 76686971. The next prime is 76686989. The reversal of 76686977 is 77968667.

It can be written as a sum of positive squares in 4 ways, for example, as 53348416 + 23338561 = 7304^2 + 4831^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76686977 - 2⁸ = 76686721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76686971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6524 + ... + 13997.

It is an arithmetic number, because the mean of its divisors is an integer number (9942909).

Almost surely, 2^76686977 is an apocalyptic number.

It is an amenable number.

76686977 is a deficient number, since it is larger than the sum of its proper divisors (2856295).

76686977 is a wasteful number, since it uses less digits than its factorization.

76686977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20659.

The product of its digits is 5334336, while the sum is 56.

The square root of 76686977 is about 8757.1100826700. The cubic root of 76686977 is about 424.8548099208.

The spelling of 76686977 in words is "seventy-six million, six hundred eighty-six thousand, nine hundred seventy-seven".