201660640320 has 56 divisors (see below), whose sum is σ = 640272536064. Its totient is φ = 53776170496.

The previous prime is 201660640283. The next prime is 201660640343. The reversal of 201660640320 is 23046066102.

201660640320 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105030624 + ... + 105032543.

It is an arithmetic number, because the mean of its divisors is an integer number (11433438144).

Almost surely, 2^201660640320 is an apocalyptic number.

201660640320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201660640320 is an abundant number, since it is smaller than the sum of its proper divisors (438611895744).

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

201660640320 is a wasteful number, since it uses less digits than its factorization.

201660640320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210063187 (or 210063177 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 201660640320 in words is "two hundred one billion, six hundred sixty million, six hundred forty thousand, three hundred twenty".