201661344 has 72 divisors (see below), whose sum is σ = 607222980. Its totient is φ = 63264768.

The previous prime is 201661337. The next prime is 201661367. The reversal of 201661344 is 443166102.

201661344 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 613 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 190771344 + 10890000 = 13812^2 + 3300^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15699 + ... + 25490.

Almost surely, 2^201661344 is an apocalyptic number.

201661344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

201661344 is an abundant number, since it is smaller than the sum of its proper divisors (405561636).

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

201661344 is a wasteful number, since it uses less digits than its factorization.

201661344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41222 (or 41211 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 201661344 is about 14200.7515294086. The cubic root of 201661344 is about 586.4183510639.

The spelling of 201661344 in words is "two hundred one million, six hundred sixty-one thousand, three hundred forty-four".