66404076 has 12 divisors (see below), whose sum is σ = 154942872. Its totient is φ = 22134688.

The previous prime is 66404033. The next prime is 66404089. The reversal of 66404076 is 67040466.

66404076 is digitally balanced in base 9, 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 (12).

66404076 is strictly pandigital in base 9.

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, 2766825 + ... + 2766848.

It is an arithmetic number, because the mean of its divisors is an integer number (12911906).

Almost surely, 2^66404076 is an apocalyptic number.

It is an amenable number.

66404076 is an abundant number, since it is smaller than the sum of its proper divisors (88538796).

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

66404076 is a wasteful number, since it uses less digits than its factorization.

66404076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5533680 (or 5533678 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 66404076 is about 8148.8696148607. The cubic root of 66404076 is about 404.9470560269.

The spelling of 66404076 in words is "sixty-six million, four hundred four thousand, seventy-six".