197116665 has 16 divisors (see below), whose sum is σ = 315620928. Its totient is φ = 105050816.

The previous prime is 197116663. The next prime is 197116679. The reversal of 197116665 is 566611791.

It is a cyclic number.

It is not a de Polignac number, because 197116665 - 2¹ = 197116663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197116663) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20122 + ... + 28268.

It is an arithmetic number, because the mean of its divisors is an integer number (19726308).

Almost surely, 2^197116665 is an apocalyptic number.

197116665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197116665 is a deficient number, since it is larger than the sum of its proper divisors (118504263).

197116665 is a wasteful number, since it uses less digits than its factorization.

197116665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9768.

The product of its digits is 68040, while the sum is 42.

The square root of 197116665 is about 14039.8242510368. The cubic root of 197116665 is about 581.9796257673.

The spelling of 197116665 in words is "one hundred ninety-seven million, one hundred sixteen thousand, six hundred sixty-five".