195764661 has 32 divisors (see below), whose sum is σ = 304128000. Its totient is φ = 124218864.

The previous prime is 195764651. The next prime is 195764663. The reversal of 195764661 is 166467591.

195764661 is a `hidden beast` number, since 19 + 576 + 4 + 6 + 61 = 666.

It is not a de Polignac number, because 195764661 - 2⁵ = 195764629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195764663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147760 + ... + 149078.

It is an arithmetic number, because the mean of its divisors is an integer number (9504000).

Almost surely, 2^195764661 is an apocalyptic number.

It is an amenable number.

195764661 is a deficient number, since it is larger than the sum of its proper divisors (108363339).

195764661 is a wasteful number, since it uses less digits than its factorization.

195764661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590 (or 1584 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 195764661 is about 13991.5925112190. The cubic root of 195764661 is about 580.6459914979.

The spelling of 195764661 in words is "one hundred ninety-five million, seven hundred sixty-four thousand, six hundred sixty-one".