201664345 has 8 divisors (see below), whose sum is σ = 252518976. Its totient is φ = 154316976.

The previous prime is 201664321. The next prime is 201664361. The reversal of 201664345 is 543466102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201664345 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876687 + ... + 876916.

It is an arithmetic number, because the mean of its divisors is an integer number (31564872).

Almost surely, 2^201664345 is an apocalyptic number.

It is an amenable number.

201664345 is a deficient number, since it is larger than the sum of its proper divisors (50854631).

201664345 is a wasteful number, since it uses less digits than its factorization.

201664345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753631.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 201664345 is about 14200.8571924374. The cubic root of 201664345 is about 586.4212599551.

The spelling of 201664345 in words is "two hundred one million, six hundred sixty-four thousand, three hundred forty-five".