201660312 has 32 divisors (see below), whose sum is σ = 576172800. Its totient is φ = 57617184.

The previous prime is 201660299. The next prime is 201660317. The reversal of 201660312 is 213066102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201660317) 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 7 ways as a sum of consecutive naturals, for example, 600012 + ... + 600347.

It is an arithmetic number, because the mean of its divisors is an integer number (18005400).

Almost surely, 2^201660312 is an apocalyptic number.

It is an amenable number.

201660312 is an abundant number, since it is smaller than the sum of its proper divisors (374512488).

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

201660312 is a wasteful number, since it uses less digits than its factorization.

201660312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200375 (or 1200371 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 201660312 is about 14200.7151932570. The cubic root of 201660312 is about 586.4173507321.

The spelling of 201660312 in words is "two hundred one million, six hundred sixty thousand, three hundred twelve".