664080426642 has 32 divisors (see below), whose sum is σ = 1331364988800. Its totient is φ = 220826256768.

The previous prime is 664080426641. The next prime is 664080426671. The reversal of 664080426642 is 246624080466.

It is a junction number, because it is equal to n+sod(n) for n = 664080426591 and 664080426600.

It is not an unprimeable number, because it can be changed into a prime (664080426641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29144358 + ... + 29167134.

It is an arithmetic number, because the mean of its divisors is an integer number (41605155900).

Almost surely, 2^664080426642 is an apocalyptic number.

664080426642 is an abundant number, since it is smaller than the sum of its proper divisors (667284562158).

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

664080426642 is a wasteful number, since it uses less digits than its factorization.

664080426642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34290.

The product of its (nonzero) digits is 2654208, while the sum is 48.

The spelling of 664080426642 in words is "six hundred sixty-four billion, eighty million, four hundred twenty-six thousand, six hundred forty-two".