66535147 has 8 divisors (see below), whose sum is σ = 77808896. Its totient is φ = 55703592.

The previous prime is 66535129. The next prime is 66535151. The reversal of 66535147 is 74153566.

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

It is not a de Polignac number, because 66535147 - 2¹⁵ = 66502379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66535177) 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, 110223 + ... + 110824.

It is an arithmetic number, because the mean of its divisors is an integer number (9726112).

Almost surely, 2^66535147 is an apocalyptic number.

66535147 is a deficient number, since it is larger than the sum of its proper divisors (11273749).

66535147 is a wasteful number, since it uses less digits than its factorization.

66535147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221097.

The product of its digits is 75600, while the sum is 37.

The square root of 66535147 is about 8156.9079313181. The cubic root of 66535147 is about 405.2133144421.

The spelling of 66535147 in words is "sixty-six million, five hundred thirty-five thousand, one hundred forty-seven".