197918664 has 32 divisors (see below), whose sum is σ = 496396320. Its totient is φ = 65759616.

The previous prime is 197918659. The next prime is 197918681. The reversal of 197918664 is 466819791.

It is a happy number.

197918664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5662 + ... + 20685.

It is an arithmetic number, because the mean of its divisors is an integer number (15512385).

Almost surely, 2^197918664 is an apocalyptic number.

It is an amenable number.

197918664 is an abundant number, since it is smaller than the sum of its proper divisors (298477656).

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

197918664 is a wasteful number, since it uses less digits than its factorization.

197918664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26669 (or 26665 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The square root of 197918664 is about 14068.3568336889. The cubic root of 197918664 is about 582.7678484754.

The spelling of 197918664 in words is "one hundred ninety-seven million, nine hundred eighteen thousand, six hundred sixty-four".