77665336 has 16 divisors (see below), whose sum is σ = 166425840. Its totient is φ = 33285120.

The previous prime is 77665249. The next prime is 77665337. The reversal of 77665336 is 63356677.

It is a junction number, because it is equal to n+sod(n) for n = 77665292 and 77665301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77665337) 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, 693385 + ... + 693496.

It is an arithmetic number, because the mean of its divisors is an integer number (10401615).

Almost surely, 2^77665336 is an apocalyptic number.

It is an amenable number.

77665336 is an abundant number, since it is smaller than the sum of its proper divisors (88760504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77665336 is a wasteful number, since it uses less digits than its factorization.

77665336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386894 (or 1386890 counting only the distinct ones).

The product of its digits is 476280, while the sum is 43.

The square root of 77665336 is about 8812.7938816246. The cubic root of 77665336 is about 426.6539216028.

The spelling of 77665336 in words is "seventy-seven million, six hundred sixty-five thousand, three hundred thirty-six".