660505055004 has 36 divisors (see below), whose sum is σ = 1669749119584. Its totient is φ = 220150006272.

The previous prime is 660505054969. The next prime is 660505055039. The reversal of 660505055004 is 400550505066.

It is a happy number.

660505055004 is a `hidden beast` number, since 6 + 6 + 0 + 50 + 50 + 550 + 0 + 4 = 666.

660505055004 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (660505054969) and next prime (660505055039).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 660505055004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 322852 + ... + 1193835.

Almost surely, 2^660505055004 is an apocalyptic number.

It is an amenable number.

660505055004 is an abundant number, since it is smaller than the sum of its proper divisors (1009244064580).

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

660505055004 is a wasteful number, since it uses less digits than its factorization.

660505055004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528794 (or 1528789 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 660505055004 in words is "six hundred sixty billion, five hundred five million, fifty-five thousand, four".