197705664 has 168 divisors, whose sum is σ = 630295920. Its totient is φ = 60742656.

The previous prime is 197705653. The next prime is 197705671. The reversal of 197705664 is 466507791.

It is a happy number.

197705664 is a `hidden beast` number, since 19 + 7 + 70 + 566 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291694 + ... + 292370.

Almost surely, 2^197705664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197705664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315147960).

197705664 is an abundant number, since it is smaller than the sum of its proper divisors (432590256).

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

197705664 is a wasteful number, since it uses less digits than its factorization.

197705664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 197705664 is about 14060.7846153762. The cubic root of 197705664 is about 582.5587152465.

The spelling of 197705664 in words is "one hundred ninety-seven million, seven hundred five thousand, six hundred sixty-four".