65877912440 has 256 divisors, whose sum is σ = 165946060800. Its totient is φ = 23428694016.

The previous prime is 65877912409. The next prime is 65877912479. The reversal of 65877912440 is 4421977856.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 169351766 + ... + 169352154.

It is an arithmetic number, because the mean of its divisors is an integer number (648226800).

Almost surely, 2^65877912440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65877912440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82973030400).

65877912440 is an abundant number, since it is smaller than the sum of its proper divisors (100068148360).

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

65877912440 is a wasteful number, since it uses less digits than its factorization.

65877912440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 65877912440 in words is "sixty-five billion, eight hundred seventy-seven million, nine hundred twelve thousand, four hundred forty".