196664961 has 16 divisors (see below), whose sum is σ = 272826368. Its totient is φ = 125874000.

The previous prime is 196664957. The next prime is 196664969. The reversal of 196664961 is 169466691.

It is not a de Polignac number, because 196664961 - 2² = 196664957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196664961.

It is not an unprimeable number, because it can be changed into a prime (196664969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3486 + ... + 20136.

It is an arithmetic number, because the mean of its divisors is an integer number (17051648).

Almost surely, 2^196664961 is an apocalyptic number.

It is an amenable number.

196664961 is a deficient number, since it is larger than the sum of its proper divisors (76161407).

196664961 is a wasteful number, since it uses less digits than its factorization.

196664961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16812.

The product of its digits is 419904, while the sum is 48.

The square root of 196664961 is about 14023.7284985128. The cubic root of 196664961 is about 581.5347393438.

The spelling of 196664961 in words is "one hundred ninety-six million, six hundred sixty-four thousand, nine hundred sixty-one".