201665480 has 16 divisors (see below), whose sum is σ = 453747420. Its totient is φ = 80666176.

The previous prime is 201665479. The next prime is 201665531. The reversal of 201665480 is 84566102.

It can be written as a sum of positive squares in 2 ways, for example, as 173554276 + 28111204 = 13174^2 + 5302^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2520779 + ... + 2520858.

Almost surely, 2^201665480 is an apocalyptic number.

201665480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201665480 is an abundant number, since it is smaller than the sum of its proper divisors (252081940).

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

201665480 is a wasteful number, since it uses less digits than its factorization.

201665480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041648 (or 5041644 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 201665480 is about 14200.8971547575. The cubic root of 201665480 is about 586.4223601114.

The spelling of 201665480 in words is "two hundred one million, six hundred sixty-five thousand, four hundred eighty".