77665442260 has 96 divisors (see below), whose sum is σ = 190477228032. Its totient is φ = 26051518080.

The previous prime is 77665442203. The next prime is 77665442347. The reversal of 77665442260 is 6224456677.

It is a congruent 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, 1164415 + ... + 1229305.

It is an arithmetic number, because the mean of its divisors is an integer number (1984137792).

Almost surely, 2^77665442260 is an apocalyptic number.

77665442260 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77665442260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95238614016).

77665442260 is an abundant number, since it is smaller than the sum of its proper divisors (112811785772).

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

77665442260 is a wasteful number, since it uses less digits than its factorization.

77665442260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65093 (or 65091 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 49.

The spelling of 77665442260 in words is "seventy-seven billion, six hundred sixty-five million, four hundred forty-two thousand, two hundred sixty".