76716809 has 8 divisors (see below), whose sum is σ = 83852160. Its totient is φ = 69757776.

The previous prime is 76716797. The next prime is 76716823. The reversal of 76716809 is 90861767.

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 76716809 - 2⁸ = 76716553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76716809.

It is not an unprimeable number, because it can be changed into a prime (76716839) 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 in 7 ways as a sum of consecutive naturals, for example, 43169 + ... + 44910.

It is an arithmetic number, because the mean of its divisors is an integer number (10481520).

Almost surely, 2^76716809 is an apocalyptic number.

It is an amenable number.

76716809 is a deficient number, since it is larger than the sum of its proper divisors (7135351).

76716809 is a wasteful number, since it uses less digits than its factorization.

76716809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88159.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 76716809 is about 8758.8132186958. The cubic root of 76716809 is about 424.9098937002.

It can be divided in two parts, 767 and 16809, that added together give a cube (17576 = 26³).

The spelling of 76716809 in words is "seventy-six million, seven hundred sixteen thousand, eight hundred nine".