197966 has 12 divisors (see below), whose sum is σ = 309816. Its totient is φ = 94860.

The previous prime is 197963. The next prime is 197969. The reversal of 197966 is 669791.

It is an interprime number because it is at equal distance from previous prime (197963) and next prime (197969).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1871 + ... + 1973.

It is an arithmetic number, because the mean of its divisors is an integer number (25818).

2¹⁹⁷⁹⁶⁶ is an apocalyptic number.

197966 is a deficient number, since it is larger than the sum of its proper divisors (111850).

197966 is a wasteful number, since it uses less digits than its factorization.

197966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 136 counting only the distinct ones).

The product of its digits is 20412, while the sum is 38.

The square root of 197966 is about 444.9337029266. The cubic root of 197966 is about 58.2814304764.

The spelling of 197966 in words is "one hundred ninety-seven thousand, nine hundred sixty-six".