201866870 has 8 divisors (see below), whose sum is σ = 363360384. Its totient is φ = 80746744.

The previous prime is 201866851. The next prime is 201866879. The reversal of 201866870 is 78668102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201866879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10093334 + ... + 10093353.

It is an arithmetic number, because the mean of its divisors is an integer number (45420048).

Almost surely, 2^201866870 is an apocalyptic number.

201866870 is a deficient number, since it is larger than the sum of its proper divisors (161493514).

201866870 is a wasteful number, since it uses less digits than its factorization.

201866870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20186694.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 201866870 is about 14207.9861345653. The cubic root of 201866870 is about 586.6175022649.

The spelling of 201866870 in words is "two hundred one million, eight hundred sixty-six thousand, eight hundred seventy".