66195537 has 8 divisors (see below), whose sum is σ = 88367136. Its totient is φ = 44077152.

The previous prime is 66195529. The next prime is 66195557. The reversal of 66195537 is 73559166.

It is a happy number.

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

It is not a de Polignac number, because 66195537 - 2³ = 66195529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66195527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10303 + ... + 15444.

It is an arithmetic number, because the mean of its divisors is an integer number (11045892).

Almost surely, 2^66195537 is an apocalyptic number.

It is an amenable number.

66195537 is a deficient number, since it is larger than the sum of its proper divisors (22171599).

66195537 is a wasteful number, since it uses less digits than its factorization.

66195537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26607.

The product of its digits is 170100, while the sum is 42.

The square root of 66195537 is about 8136.0639746747. The cubic root of 66195537 is about 404.5227055216.

The spelling of 66195537 in words is "sixty-six million, one hundred ninety-five thousand, five hundred thirty-seven".