664350124540 has 24 divisors (see below), whose sum is σ = 1395183251952. Its totient is φ = 265730908800.

The previous prime is 664350124523. The next prime is 664350124619. The reversal of 664350124540 is 45421053466.

It is a super-2 number, since 2×664350124540² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664350124493 and 664350124502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40632 + ... + 1153408.

It is an arithmetic number, because the mean of its divisors is an integer number (58132635498).

Almost surely, 2^664350124540 is an apocalyptic number.

It is an amenable number.

664350124540 is an abundant number, since it is smaller than the sum of its proper divisors (730833127412).

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

664350124540 is a wasteful number, since it uses less digits than its factorization.

664350124540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142637 (or 1142635 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 664350124540 in words is "six hundred sixty-four billion, three hundred fifty million, one hundred twenty-four thousand, five hundred forty".