201660654 has 32 divisors (see below), whose sum is σ = 442550304. Its totient is φ = 60877440.

The previous prime is 201660649. The next prime is 201660677. The reversal of 201660654 is 456066102.

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 15 ways as a sum of consecutive naturals, for example, 20257 + ... + 28524.

It is an arithmetic number, because the mean of its divisors is an integer number (13829697).

Almost surely, 2^201660654 is an apocalyptic number.

201660654 is an abundant number, since it is smaller than the sum of its proper divisors (240889650).

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

201660654 is a wasteful number, since it uses less digits than its factorization.

201660654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48852.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 201660654 is about 14200.7272348989. The cubic root of 201660654 is about 586.4176822378.

The spelling of 201660654 in words is "two hundred one million, six hundred sixty thousand, six hundred fifty-four".