201663663 has 8 divisors (see below), whose sum is σ = 283036800. Its totient is φ = 127366488.

The previous prime is 201663647. The next prime is 201663677. The reversal of 201663663 is 366366102.

It is a happy number.

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

It is not a de Polignac number, because 201663663 - 2⁴ = 201663647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201663613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1768923 + ... + 1769036.

It is an arithmetic number, because the mean of its divisors is an integer number (35379600).

Almost surely, 2^201663663 is an apocalyptic number.

201663663 is a deficient number, since it is larger than the sum of its proper divisors (81373137).

201663663 is a wasteful number, since it uses less digits than its factorization.

201663663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537981.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 201663663 is about 14200.8331797821. The cubic root of 201663663 is about 586.4205988901.

The spelling of 201663663 in words is "two hundred one million, six hundred sixty-three thousand, six hundred sixty-three".