201890166 has 16 divisors (see below), whose sum is σ = 416805888. Its totient is φ = 65125800.

The previous prime is 201890137. The next prime is 201890173. The reversal of 201890166 is 661098102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542530 + ... + 542901.

It is an arithmetic number, because the mean of its divisors is an integer number (26050368).

Almost surely, 2^201890166 is an apocalyptic number.

201890166 is an abundant number, since it is smaller than the sum of its proper divisors (214915722).

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

201890166 is a wasteful number, since it uses less digits than its factorization.

201890166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085467.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 201890166 is about 14208.8059315341. The cubic root of 201890166 is about 586.6400671623.

The spelling of 201890166 in words is "two hundred one million, eight hundred ninety thousand, one hundred sixty-six".