77665359412 has 12 divisors (see below), whose sum is σ = 136597367200. Its totient is φ = 38637540216.

The previous prime is 77665359383. The next prime is 77665359413. The reversal of 77665359412 is 21495356677.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77665359413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48783978 + ... + 48785569.

Almost surely, 2^77665359412 is an apocalyptic number.

It is an amenable number.

77665359412 is a deficient number, since it is larger than the sum of its proper divisors (58932007788).

77665359412 is a wasteful number, since it uses less digits than its factorization.

77665359412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97569750 (or 97569748 counting only the distinct ones).

The product of its digits is 9525600, while the sum is 55.

The spelling of 77665359412 in words is "seventy-seven billion, six hundred sixty-five million, three hundred fifty-nine thousand, four hundred twelve".