664004626242 has 32 divisors (see below), whose sum is σ = 1331442365184. Its totient is φ = 220762963200.

The previous prime is 664004626231. The next prime is 664004626249. The reversal of 664004626242 is 242626400466.

It is a junction number, because it is equal to n+sod(n) for n = 664004626194 and 664004626203.

It is not an unprimeable number, because it can be changed into a prime (664004626249) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10366378 + ... + 10430234.

It is an arithmetic number, because the mean of its divisors is an integer number (41607573912).

Almost surely, 2^664004626242 is an apocalyptic number.

664004626242 is an abundant number, since it is smaller than the sum of its proper divisors (667437738942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664004626242 is a wasteful number, since it uses less digits than its factorization.

664004626242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68314.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 664004626242 in words is "six hundred sixty-four billion, four million, six hundred twenty-six thousand, two hundred forty-two".