66532577 has 8 divisors (see below), whose sum is σ = 70713000. Its totient is φ = 62381824.

The previous prime is 66532519. The next prime is 66532597. The reversal of 66532577 is 77523566.

It can be written as a sum of positive squares in 4 ways, for example, as 13184161 + 53348416 = 3631^2 + 7304^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66532577 - 2¹⁶ = 66467041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66532597) 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, 2702 + ... + 11847.

It is an arithmetic number, because the mean of its divisors is an integer number (8839125).

Almost surely, 2^66532577 is an apocalyptic number.

It is an amenable number.

66532577 is a deficient number, since it is larger than the sum of its proper divisors (4180423).

66532577 is a wasteful number, since it uses less digits than its factorization.

66532577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14835.

The product of its digits is 264600, while the sum is 41.

The square root of 66532577 is about 8156.7503946118. The cubic root of 66532577 is about 405.2080970912.

The spelling of 66532577 in words is "sixty-six million, five hundred thirty-two thousand, five hundred seventy-seven".