660162772650 has 24 divisors (see below), whose sum is σ = 1637203676544. Its totient is φ = 176043406000.

The previous prime is 660162772649. The next prime is 660162772657. The reversal of 660162772650 is 56277261066.

It is a self number, because there is not a number n which added to its sum of digits gives 660162772650.

It is not an unprimeable number, because it can be changed into a prime (660162772657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2200542426 + ... + 2200542725.

It is an arithmetic number, because the mean of its divisors is an integer number (68216819856).

Almost surely, 2^660162772650 is an apocalyptic number.

660162772650 is an abundant number, since it is smaller than the sum of its proper divisors (977040903894).

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

660162772650 is a wasteful number, since it uses less digits than its factorization.

660162772650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401085166 (or 4401085161 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 660162772650 in words is "six hundred sixty billion, one hundred sixty-two million, seven hundred seventy-two thousand, six hundred fifty".