201670201866 has 16 divisors (see below), whose sum is σ = 460960461504. Its totient is φ = 57620057664.

The previous prime is 201670201849. The next prime is 201670201877. The reversal of 201670201866 is 668102076102.

201670201866 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2400835695 + ... + 2400835778.

It is an arithmetic number, because the mean of its divisors is an integer number (28810028844).

Almost surely, 2^201670201866 is an apocalyptic number.

201670201866 is an abundant number, since it is smaller than the sum of its proper divisors (259290259638).

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

201670201866 is a wasteful number, since it uses less digits than its factorization.

201670201866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801671485.

The product of its (nonzero) digits is 48384, while the sum is 39.

Adding to 201670201866 its reverse (668102076102), we get a palindrome (869772277968).

The spelling of 201670201866 in words is "two hundred one billion, six hundred seventy million, two hundred one thousand, eight hundred sixty-six".