197997066 has 12 divisors (see below), whose sum is σ = 428993682. Its totient is φ = 65999016.

The previous prime is 197997053. The next prime is 197997103. The reversal of 197997066 is 660799791.

197997066 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 194017041 + 3980025 = 13929^2 + 1995^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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 5 ways as a sum of consecutive naturals, for example, 5499901 + ... + 5499936.

Almost surely, 2^197997066 is an apocalyptic number.

197997066 is an abundant number, since it is smaller than the sum of its proper divisors (230996616).

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

197997066 is a wasteful number, since it uses less digits than its factorization.

197997066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10999845 (or 10999842 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The square root of 197997066 is about 14071.1430239338. The cubic root of 197997066 is about 582.8447893967.

The spelling of 197997066 in words is "one hundred ninety-seven million, nine hundred ninety-seven thousand, sixty-six".