66195131583 has 8 divisors (see below), whose sum is σ = 100868771968. Its totient is φ = 37825789464.

The previous prime is 66195131557. The next prime is 66195131593. The reversal of 66195131583 is 38513159166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66195131583 - 2¹⁰ = 66195130559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66195131593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1576074541 + ... + 1576074582.

It is an arithmetic number, because the mean of its divisors is an integer number (12608596496).

Almost surely, 2^66195131583 is an apocalyptic number.

66195131583 is a deficient number, since it is larger than the sum of its proper divisors (34673640385).

66195131583 is a wasteful number, since it uses less digits than its factorization.

66195131583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152149133.

The product of its digits is 583200, while the sum is 48.

The spelling of 66195131583 in words is "sixty-six billion, one hundred ninety-five million, one hundred thirty-one thousand, five hundred eighty-three".