664135442 has 8 divisors (see below), whose sum is σ = 1039516416. Its totient is φ = 317629972.

The previous prime is 664135441. The next prime is 664135457. The reversal of 664135442 is 244531466.

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

It is not an unprimeable number, because it can be changed into a prime (664135441) 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, 7218818 + ... + 7218909.

It is an arithmetic number, because the mean of its divisors is an integer number (129939552).

Almost surely, 2^664135442 is an apocalyptic number.

664135442 is a deficient number, since it is larger than the sum of its proper divisors (375380974).

664135442 is a wasteful number, since it uses less digits than its factorization.

664135442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14437752.

The product of its digits is 69120, while the sum is 35.

The square root of 664135442 is about 25770.8254039330. The cubic root of 664135442 is about 872.4734482879.

The spelling of 664135442 in words is "six hundred sixty-four million, one hundred thirty-five thousand, four hundred forty-two".