201556664 has 8 divisors (see below), whose sum is σ = 377918760. Its totient is φ = 100778328.

The previous prime is 201556661. The next prime is 201556669. The reversal of 201556664 is 466655102.

201556664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201556661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12597284 + ... + 12597299.

It is an arithmetic number, because the mean of its divisors is an integer number (47239845).

Almost surely, 2^201556664 is an apocalyptic number.

It is an amenable number.

201556664 is a deficient number, since it is larger than the sum of its proper divisors (176362096).

201556664 is a wasteful number, since it uses less digits than its factorization.

201556664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25194589 (or 25194585 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 201556664 is about 14197.0653305534. The cubic root of 201556664 is about 586.3168659099.

The spelling of 201556664 in words is "two hundred one million, five hundred fifty-six thousand, six hundred sixty-four".