664436042 has 16 divisors (see below), whose sum is σ = 1051699200. Its totient is φ = 313956000.

The previous prime is 664436027. The next prime is 664436063. The reversal of 664436042 is 240634466.

It is a junction number, because it is equal to n+sod(n) for n = 664435993 and 664436011.

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 7 ways as a sum of consecutive naturals, for example, 5834 + ... + 36917.

It is an arithmetic number, because the mean of its divisors is an integer number (65731200).

Almost surely, 2^664436042 is an apocalyptic number.

664436042 is a deficient number, since it is larger than the sum of its proper divisors (387263158).

664436042 is a wasteful number, since it uses less digits than its factorization.

664436042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43181.

The product of its (nonzero) digits is 82944, while the sum is 35.

The square root of 664436042 is about 25776.6569205551. The cubic root of 664436042 is about 872.6050609797.

The spelling of 664436042 in words is "six hundred sixty-four million, four hundred thirty-six thousand, forty-two".