77678806 has 8 divisors (see below), whose sum is σ = 117071064. Its totient is φ = 38655120.

The previous prime is 77678801. The next prime is 77678813. The reversal of 77678806 is 60887677.

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

It is a self number, because there is not a number n which added to its sum of digits gives 77678806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77678801) 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 3 ways as a sum of consecutive naturals, for example, 91615 + ... + 92458.

It is an arithmetic number, because the mean of its divisors is an integer number (14633883).

Almost surely, 2^77678806 is an apocalyptic number.

77678806 is a deficient number, since it is larger than the sum of its proper divisors (39392258).

77678806 is a wasteful number, since it uses less digits than its factorization.

77678806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184286.

The product of its (nonzero) digits is 790272, while the sum is 49.

The square root of 77678806 is about 8813.5580783246. The cubic root of 77678806 is about 426.6785859572.

The spelling of 77678806 in words is "seventy-seven million, six hundred seventy-eight thousand, eight hundred six".