65766278240 has 48 divisors (see below), whose sum is σ = 167324593968. Its totient is φ = 24282932736.

The previous prime is 65766278219. The next prime is 65766278261. The reversal of 65766278240 is 4287266756.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (65766278219) and next prime (65766278261).

It is a congruent number.

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, 15807122 + ... + 15811281.

It is an arithmetic number, because the mean of its divisors is an integer number (3485929041).

Almost surely, 2^65766278240 is an apocalyptic number.

It is an amenable number.

65766278240 is an abundant number, since it is smaller than the sum of its proper divisors (101558315728).

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

65766278240 is a wasteful number, since it uses less digits than its factorization.

65766278240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31618431 (or 31618423 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 65766278240 in words is "sixty-five billion, seven hundred sixty-six million, two hundred seventy-eight thousand, two hundred forty".