660242624440 has 32 divisors (see below), whose sum is σ = 1697766749280. Its totient is φ = 226368899712.

The previous prime is 660242624417. The next prime is 660242624471. The reversal of 660242624440 is 44426242066.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 660242624393 and 660242624402.

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, 1179004407 + ... + 1179004966.

It is an arithmetic number, because the mean of its divisors is an integer number (53055210915).

Almost surely, 2^660242624440 is an apocalyptic number.

It is an amenable number.

660242624440 is an abundant number, since it is smaller than the sum of its proper divisors (1037524124840).

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

660242624440 is a wasteful number, since it uses less digits than its factorization.

660242624440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2358009391 (or 2358009387 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 40.

The spelling of 660242624440 in words is "six hundred sixty billion, two hundred forty-two million, six hundred twenty-four thousand, four hundred forty".