201663456 has 24 divisors (see below), whose sum is σ = 529366824. Its totient is φ = 67221120.

The previous prime is 201663439. The next prime is 201663457. The reversal of 201663456 is 654366102.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×201663456³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201663457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050235 + ... + 1050426.

It is an arithmetic number, because the mean of its divisors is an integer number (22056951).

Almost surely, 2^201663456 is an apocalyptic number.

It is an amenable number.

201663456 is an abundant number, since it is smaller than the sum of its proper divisors (327703368).

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

201663456 is a wasteful number, since it uses less digits than its factorization.

201663456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100674 (or 2100666 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 201663456 is about 14200.8258914755. The cubic root of 201663456 is about 586.4203982439.

The spelling of 201663456 in words is "two hundred one million, six hundred sixty-three thousand, four hundred fifty-six".