664464026040 has 64 divisors (see below), whose sum is σ = 1995796951200. Its totient is φ = 176976640512.

The previous prime is 664464026029. The next prime is 664464026053. The reversal of 664464026040 is 40620464466.

It is a super-3 number, since 3×664464026040³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664464025983 and 664464026001.

It is a congruent number.

It is an unprimeable number.

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, 3240207 + ... + 3439166.

Almost surely, 2^664464026040 is an apocalyptic number.

664464026040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664464026040 is an abundant number, since it is smaller than the sum of its proper divisors (1331332925160).

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

664464026040 is a wasteful number, since it uses less digits than its factorization.

664464026040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680216 (or 6680212 counting only the distinct ones).

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

The spelling of 664464026040 in words is "six hundred sixty-four billion, four hundred sixty-four million, twenty-six thousand, forty".