66434784 has 48 divisors (see below), whose sum is σ = 187809552. Its totient is φ = 20441088.

The previous prime is 66434749. The next prime is 66434807. The reversal of 66434784 is 48743466.

It is a tau number, because it is divible by the number of its divisors (48).

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, 25369 + ... + 27864.

It is an arithmetic number, because the mean of its divisors is an integer number (3912699).

Almost surely, 2^66434784 is an apocalyptic number.

It is an amenable number.

66434784 is an abundant number, since it is smaller than the sum of its proper divisors (121374768).

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

66434784 is a wasteful number, since it uses less digits than its factorization.

66434784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53259 (or 53251 counting only the distinct ones).

The product of its digits is 387072, while the sum is 42.

The square root of 66434784 is about 8150.7535847920. The cubic root of 66434784 is about 405.0094678476.

The spelling of 66434784 in words is "sixty-six million, four hundred thirty-four thousand, seven hundred eighty-four".