664042502 has 8 divisors (see below), whose sum is σ = 996677136. Its totient is φ = 331816792.

The previous prime is 664042501. The next prime is 664042517. The reversal of 664042502 is 205240466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664042501) 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, 98138 + ... + 104685.

It is an arithmetic number, because the mean of its divisors is an integer number (124584642).

Almost surely, 2^664042502 is an apocalyptic number.

664042502 is a deficient number, since it is larger than the sum of its proper divisors (332634634).

664042502 is a wasteful number, since it uses less digits than its factorization.

664042502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204462.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 664042502 is about 25769.0221389947. The cubic root of 664042502 is about 872.4327480231.

Adding to 664042502 its reverse (205240466), we get a palindrome (869282968).

The spelling of 664042502 in words is "six hundred sixty-four million, forty-two thousand, five hundred two".