77732065825866 has 16 divisors (see below), whose sum is σ = 172737924057600. Its totient is φ = 25910688608604.

The previous prime is 77732065825787. The next prime is 77732065825877. The reversal of 77732065825866 is 66852856023777.

77732065825866 is a `hidden beast` number, since 7 + 7 + 7 + 32 + 0 + 6 + 5 + 8 + 2 + 586 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 77732065825794 and 77732065825803.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 719741350186 + ... + 719741350293.

It is an arithmetic number, because the mean of its divisors is an integer number (10796120253600).

Almost surely, 2^{77732065825866} is an apocalyptic number.

77732065825866 is an abundant number, since it is smaller than the sum of its proper divisors (95005858231734).

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

77732065825866 is a wasteful number, since it uses less digits than its factorization.

77732065825866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439482700490 (or 1439482700484 counting only the distinct ones).

The product of its (nonzero) digits is 1422489600, while the sum is 72.

The spelling of 77732065825866 in words is "seventy-seven trillion, seven hundred thirty-two billion, sixty-five million, eight hundred twenty-five thousand, eight hundred sixty-six".