201061566 has 12 divisors (see below), whose sum is σ = 435633432. Its totient is φ = 67020516.

The previous prime is 201061543. The next prime is 201061583. The reversal of 201061566 is 665160102.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5585026 + ... + 5585061.

It is an arithmetic number, because the mean of its divisors is an integer number (36302786).

Almost surely, 2^201061566 is an apocalyptic number.

201061566 is an abundant number, since it is smaller than the sum of its proper divisors (234571866).

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

201061566 is a wasteful number, since it uses less digits than its factorization.

201061566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11170095 (or 11170092 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 201061566 is about 14179.6179779287. The cubic root of 201061566 is about 585.8364016592.

The spelling of 201061566 in words is "two hundred one million, sixty-one thousand, five hundred sixty-six".