660442004 has 12 divisors (see below), whose sum is σ = 1156108800. Its totient is φ = 330125208.

The previous prime is 660441973. The next prime is 660442007. The reversal of 660442004 is 400244066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660442007) 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, 7124 + ... + 37035.

It is an arithmetic number, because the mean of its divisors is an integer number (96342400).

Almost surely, 2^660442004 is an apocalyptic number.

It is an amenable number.

660442004 is a deficient number, since it is larger than the sum of its proper divisors (495666796).

660442004 is a wasteful number, since it uses less digits than its factorization.

660442004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47902 (or 47900 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 660442004 is about 25699.0662087166. The cubic root of 660442004 is about 870.8530866841.

The spelling of 660442004 in words is "six hundred sixty million, four hundred forty-two thousand, four".