66404446 has 8 divisors (see below), whose sum is σ = 99734040. Its totient is φ = 33159768.

The previous prime is 66404423. The next prime is 66404453. The reversal of 66404446 is 64440466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 19236 + ... + 22423.

It is an arithmetic number, because the mean of its divisors is an integer number (12466755).

Almost surely, 2^66404446 is an apocalyptic number.

66404446 is a deficient number, since it is larger than the sum of its proper divisors (33329594).

66404446 is a wasteful number, since it uses less digits than its factorization.

66404446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42458.

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 66404446 is about 8148.8923173644. The cubic root of 66404446 is about 404.9478081400.

The spelling of 66404446 in words is "sixty-six million, four hundred four thousand, four hundred forty-six".