42168664 has 16 divisors (see below), whose sum is σ = 80995320. Its totient is φ = 20569920.

The previous prime is 42168617. The next prime is 42168671. The reversal of 42168664 is 46686124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63954 + ... + 64609.

Almost surely, 2^42168664 is an apocalyptic number.

It is an amenable number.

42168664 is a deficient number, since it is larger than the sum of its proper divisors (38826656).

42168664 is a wasteful number, since it uses less digits than its factorization.

42168664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128610 (or 128606 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 42168664 is about 6493.7403705415. The cubic root of 42168664 is about 348.0673450499.

It can be divided in two parts, 4216 and 8664, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 42168664 in words is "forty-two million, one hundred sixty-eight thousand, six hundred sixty-four".