66532297 has 4 divisors (see below), whose sum is σ = 71650180. Its totient is φ = 61414416.

The previous prime is 66532289. The next prime is 66532337. The reversal of 66532297 is 79223566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79223566 = 2 ⋅39611783.

It can be written as a sum of positive squares in 2 ways, for example, as 45104656 + 21427641 = 6716^2 + 4629^2 .

It is a cyclic number.

It is not a de Polignac number, because 66532297 - 2³ = 66532289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66532247) 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 3 ways as a sum of consecutive naturals, for example, 2558922 + ... + 2558947.

It is an arithmetic number, because the mean of its divisors is an integer number (17912545).

Almost surely, 2^66532297 is an apocalyptic number.

It is an amenable number.

66532297 is a deficient number, since it is larger than the sum of its proper divisors (5117883).

66532297 is a wasteful number, since it uses less digits than its factorization.

66532297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117882.

The product of its digits is 136080, while the sum is 40.

The square root of 66532297 is about 8156.7332308958. The cubic root of 66532297 is about 405.2075286557.

The spelling of 66532297 in words is "sixty-six million, five hundred thirty-two thousand, two hundred ninety-seven".