664159942 has 8 divisors (see below), whose sum is σ = 996585696. Its totient is φ = 331964712.

The previous prime is 664159939. The next prime is 664159957. The reversal of 664159942 is 249951466.

664159942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×664159942² = 882216857114886728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664159892 and 664159901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50238 + ... + 62065.

It is an arithmetic number, because the mean of its divisors is an integer number (124573212).

Almost surely, 2^664159942 is an apocalyptic number.

664159942 is a deficient number, since it is larger than the sum of its proper divisors (332425754).

664159942 is a wasteful number, since it uses less digits than its factorization.

664159942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115262.

The product of its digits is 466560, while the sum is 46.

The square root of 664159942 is about 25771.3007432687. The cubic root of 664159942 is about 872.4841766902.

The spelling of 664159942 in words is "six hundred sixty-four million, one hundred fifty-nine thousand, nine hundred forty-two".