65778384 has 60 divisors (see below), whose sum is σ = 197677824. Its totient is φ = 18793152.

The previous prime is 65778343. The next prime is 65778397. The reversal of 65778384 is 48387756.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11632 + ... + 16335.

Almost surely, 2^65778384 is an apocalyptic number.

It is an amenable number.

65778384 is an abundant number, since it is smaller than the sum of its proper divisors (131899440).

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

65778384 is a wasteful number, since it uses less digits than its factorization.

65778384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27992 (or 27979 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

The square root of 65778384 is about 8110.3874136813. The cubic root of 65778384 is about 403.6711698667.

The spelling of 65778384 in words is "sixty-five million, seven hundred seventy-eight thousand, three hundred eighty-four".