197403066 has 144 divisors (see below), whose sum is σ = 535227264. Its totient is φ = 52291008.

The previous prime is 197403049. The next prime is 197403079. The reversal of 197403066 is 660304791.

197403066 is a `hidden beast` number, since 197 + 403 + 0 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 197403066.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 750451 + ... + 750713.

It is an arithmetic number, because the mean of its divisors is an integer number (3716856).

Almost surely, 2^197403066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197403066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267613632).

197403066 is an abundant number, since it is smaller than the sum of its proper divisors (337824198).

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

197403066 is a wasteful number, since it uses less digits than its factorization.

197403066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 197403066 is about 14050.0201423343. The cubic root of 197403066 is about 582.2613521350.

The spelling of 197403066 in words is "one hundred ninety-seven million, four hundred three thousand, sixty-six".