195666633 has 12 divisors (see below), whose sum is σ = 284265540. Its totient is φ = 129689376.

The previous prime is 195666631. The next prime is 195666649. The reversal of 195666633 is 336666591.

195666633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 155825289 + 39841344 = 12483^2 + 6312^2 .

It is not a de Polignac number, because 195666633 - 2¹ = 195666631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195666631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61278 + ... + 64391.

It is an arithmetic number, because the mean of its divisors is an integer number (23688795).

Almost surely, 2^195666633 is an apocalyptic number.

It is an amenable number.

195666633 is a deficient number, since it is larger than the sum of its proper divisors (88598907).

195666633 is a wasteful number, since it uses less digits than its factorization.

195666633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125848 (or 125845 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 195666633 is about 13988.0889688334. The cubic root of 195666633 is about 580.5490569638.

The spelling of 195666633 in words is "one hundred ninety-five million, six hundred sixty-six thousand, six hundred thirty-three".