197704822066 has 4 divisors (see below), whose sum is σ = 296557233102. Its totient is φ = 98852411032.

The previous prime is 197704821983. The next prime is 197704822099. The reversal of 197704822066 is 660228407791.

197704822066 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660228407791 = 35053 ⋅18835147.

It can be written as a sum of positive squares in only one way, i.e., 194675970841 + 3028851225 = 441221^2 + 55035^2 .

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 as a sum of consecutive naturals, namely, 49426205515 + ... + 49426205518.

Almost surely, 2^197704822066 is an apocalyptic number.

197704822066 is a deficient number, since it is larger than the sum of its proper divisors (98852411036).

197704822066 is an equidigital number, since it uses as much as digits as its factorization.

197704822066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98852411035.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 197704822066 in words is "one hundred ninety-seven billion, seven hundred four million, eight hundred twenty-two thousand, sixty-six".