66288004 has 12 divisors (see below), whose sum is σ = 116137728. Its totient is φ = 33105800.

The previous prime is 66287993. The next prime is 66288007. The reversal of 66288004 is 40088266.

It is not an unprimeable number, because it can be changed into a prime (66288007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5452 + ... + 12739.

It is an arithmetic number, because the mean of its divisors is an integer number (9678144).

Almost surely, 2^66288004 is an apocalyptic number.

It is an amenable number.

66288004 is a deficient number, since it is larger than the sum of its proper divisors (49849724).

66288004 is a wasteful number, since it uses less digits than its factorization.

66288004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19106 (or 19104 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 66288004 is about 8141.7445305045. The cubic root of 66288004 is about 404.7109739935.

The spelling of 66288004 in words is "sixty-six million, two hundred eighty-eight thousand, four".