66539277 has 12 divisors (see below), whose sum is σ = 109842720. Its totient is φ = 38022408.

The previous prime is 66539267. The next prime is 66539303. The reversal of 66539277 is 77293566.

It is not a de Polignac number, because 66539277 - 2⁴ = 66539261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66539257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 528027 + ... + 528152.

It is an arithmetic number, because the mean of its divisors is an integer number (9153560).

Almost surely, 2^66539277 is an apocalyptic number.

It is an amenable number.

66539277 is a deficient number, since it is larger than the sum of its proper divisors (43303443).

66539277 is a wasteful number, since it uses less digits than its factorization.

66539277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056192 (or 1056189 counting only the distinct ones).

The product of its digits is 476280, while the sum is 45.

The square root of 66539277 is about 8157.1610870449. The cubic root of 66539277 is about 405.2216984639.

The spelling of 66539277 in words is "sixty-six million, five hundred thirty-nine thousand, two hundred seventy-seven".