664735142 has 8 divisors (see below), whose sum is σ = 997213800. Its totient is φ = 332330544.

The previous prime is 664735133. The next prime is 664735163. The reversal of 664735142 is 241537466.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 664735096 and 664735105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19709 + ... + 41447.

It is an arithmetic number, because the mean of its divisors is an integer number (124651725).

Almost surely, 2^664735142 is an apocalyptic number.

664735142 is a deficient number, since it is larger than the sum of its proper divisors (332478658).

664735142 is a wasteful number, since it uses less digits than its factorization.

664735142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37030.

The product of its digits is 120960, while the sum is 38.

The square root of 664735142 is about 25782.4580286675. The cubic root of 664735142 is about 872.7359775285.

The spelling of 664735142 in words is "six hundred sixty-four million, seven hundred thirty-five thousand, one hundred forty-two".