66404032 has 14 divisors (see below), whose sum is σ = 131770628. Its totient is φ = 33201984.

The previous prime is 66404027. The next prime is 66404033. The reversal of 66404032 is 23040466.

It is a junction number, because it is equal to n+sod(n) for n = 66403988 and 66404006.

It is not an unprimeable number, because it can be changed into a prime (66404033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 518718 + ... + 518845.

Almost surely, 2^66404032 is an apocalyptic number.

It is an amenable number.

66404032 is a deficient number, since it is larger than the sum of its proper divisors (65366596).

66404032 is a wasteful number, since it uses less digits than its factorization.

66404032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037575 (or 1037565 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 66404032 is about 8148.8669150993. The cubic root of 66404032 is about 404.9469665862.

Adding to 66404032 its reverse (23040466), we get a palindrome (89444498).

The spelling of 66404032 in words is "sixty-six million, four hundred four thousand, thirty-two".