76776689 has 4 divisors (see below), whose sum is σ = 83756400. Its totient is φ = 69796980.

The previous prime is 76776671. The next prime is 76776731. The reversal of 76776689 is 98667767.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-76776689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76770689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3489839 + ... + 3489860.

It is an arithmetic number, because the mean of its divisors is an integer number (20939100).

Almost surely, 2^76776689 is an apocalyptic number.

It is an amenable number.

76776689 is a deficient number, since it is larger than the sum of its proper divisors (6979711).

76776689 is a wasteful number, since it uses less digits than its factorization.

76776689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6979710.

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

The square root of 76776689 is about 8762.2308232550. The cubic root of 76776689 is about 425.0204170122.

The spelling of 76776689 in words is "seventy-six million, seven hundred seventy-six thousand, six hundred eighty-nine".