66278496 has 48 divisors (see below), whose sum is σ = 179601408. Its totient is φ = 21379200.

The previous prime is 66278491. The next prime is 66278539. The reversal of 66278496 is 69487266.

66278496 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66278491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8160 + ... + 14111.

It is an arithmetic number, because the mean of its divisors is an integer number (3741696).

Almost surely, 2^66278496 is an apocalyptic number.

It is an amenable number.

66278496 is an abundant number, since it is smaller than the sum of its proper divisors (113322912).

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

66278496 is a wasteful number, since it uses less digits than its factorization.

66278496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22315 (or 22307 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 66278496 is about 8141.1606052209. The cubic root of 66278496 is about 404.6916232025.

The spelling of 66278496 in words is "sixty-six million, two hundred seventy-eight thousand, four hundred ninety-six".