66339456 has 32 divisors (see below), whose sum is σ = 176215200. Its totient is φ = 22113024.

The previous prime is 66339439. The next prime is 66339463. The reversal of 66339456 is 65493366.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85996 + ... + 86763.

It is an arithmetic number, because the mean of its divisors is an integer number (5506725).

Almost surely, 2^66339456 is an apocalyptic number.

It is an amenable number.

66339456 is an abundant number, since it is smaller than the sum of its proper divisors (109875744).

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

66339456 is a wasteful number, since it uses less digits than its factorization.

66339456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172776 (or 172764 counting only the distinct ones).

The product of its digits is 349920, while the sum is 42.

The square root of 66339456 is about 8144.9036826718. The cubic root of 66339456 is about 404.8156576091.

It can be divided in two parts, 66339 and 456, that added together give a triangular number (66795 = T₃₆₅).

The spelling of 66339456 in words is "sixty-six million, three hundred thirty-nine thousand, four hundred fifty-six".