77667677 has 4 divisors (see below), whose sum is σ = 77722656. Its totient is φ = 77612700.

The previous prime is 77667647. The next prime is 77667697. The reversal of 77667677 is 77676677.

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 cyclic number.

It is not a de Polignac number, because 77667677 - 2⁶ = 77667613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77667637) 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, 25313 + ... + 28214.

It is an arithmetic number, because the mean of its divisors is an integer number (19430664).

Almost surely, 2^77667677 is an apocalyptic number.

It is an amenable number.

77667677 is a deficient number, since it is larger than the sum of its proper divisors (54979).

77667677 is a wasteful number, since it uses less digits than its factorization.

77667677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54978.

The product of its digits is 3630312, while the sum is 53.

The square root of 77667677 is about 8812.9266988895. The cubic root of 77667677 is about 426.6582083149.

The spelling of 77667677 in words is "seventy-seven million, six hundred sixty-seven thousand, six hundred seventy-seven".