660064051540 has 48 divisors (see below), whose sum is σ = 1418515293888. Its totient is φ = 257859108864.

The previous prime is 660064051489. The next prime is 660064051547. The reversal of 660064051540 is 45150460066.

It is a self number, because there is not a number n which added to its sum of digits gives 660064051540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660064051547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9807444 + ... + 9874516.

It is an arithmetic number, because the mean of its divisors is an integer number (29552401956).

Almost surely, 2^660064051540 is an apocalyptic number.

It is an amenable number.

660064051540 is an abundant number, since it is smaller than the sum of its proper divisors (758451242348).

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

660064051540 is a wasteful number, since it uses less digits than its factorization.

660064051540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78568 (or 78566 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 660064051540 in words is "six hundred sixty billion, sixty-four million, fifty-one thousand, five hundred forty".