77662805682 has 128 divisors (see below), whose sum is σ = 199990425600. Its totient is φ = 19928637120.

The previous prime is 77662805669. The next prime is 77662805699. The reversal of 77662805682 is 28650826677.

It is a happy number.

It is a super-2 number, since 2×77662805682² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1858288 + ... + 1899620.

It is an arithmetic number, because the mean of its divisors is an integer number (1562425200).

Almost surely, 2^77662805682 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77662805682, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99995212800).

77662805682 is an abundant number, since it is smaller than the sum of its proper divisors (122327619918).

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

77662805682 is a wasteful number, since it uses less digits than its factorization.

77662805682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41453 (or 41439 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 77662805682 in words is "seventy-seven billion, six hundred sixty-two million, eight hundred five thousand, six hundred eighty-two".