77582320266 has 64 divisors (see below), whose sum is σ = 188660689920. Its totient is φ = 20962287360.

The previous prime is 77582320241. The next prime is 77582320297. The reversal of 77582320266 is 66202328577.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1798326 + ... + 1840961.

It is an arithmetic number, because the mean of its divisors is an integer number (2947823280).

Almost surely, 2^77582320266 is an apocalyptic number.

77582320266 is an abundant number, since it is smaller than the sum of its proper divisors (111078369654).

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

77582320266 is a wasteful number, since it uses less digits than its factorization.

77582320266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639339.

The product of its (nonzero) digits is 1693440, while the sum is 48.

The spelling of 77582320266 in words is "seventy-seven billion, five hundred eighty-two million, three hundred twenty thousand, two hundred sixty-six".