201580664 has 16 divisors (see below), whose sum is σ = 378231000. Its totient is φ = 100719072.

The previous prime is 201580663. The next prime is 201580669. The reversal of 201580664 is 466085102.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 201580664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201580663) by changing a digit.

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, 4259 + ... + 20525.

Almost surely, 2^201580664 is an apocalyptic number.

It is an amenable number.

201580664 is a deficient number, since it is larger than the sum of its proper divisors (176650336).

201580664 is a wasteful number, since it uses less digits than its factorization.

201580664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17822 (or 17818 counting only the distinct ones).

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

The square root of 201580664 is about 14197.9105505000. The cubic root of 201580664 is about 586.3401365310.

The spelling of 201580664 in words is "two hundred one million, five hundred eighty thousand, six hundred sixty-four".