66532253 has 8 divisors (see below), whose sum is σ = 68939448. Its totient is φ = 64157184.

The previous prime is 66532247. The next prime is 66532289. The reversal of 66532253 is 35223566.

It can be written as a sum of positive squares in 4 ways, for example, as 13271449 + 53260804 = 3643^2 + 7298^2 .

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 66532253 - 2⁶ = 66532189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66532853) 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, 3776 + ... + 12137.

It is an arithmetic number, because the mean of its divisors is an integer number (8617431).

Almost surely, 2^66532253 is an apocalyptic number.

It is an amenable number.

66532253 is a deficient number, since it is larger than the sum of its proper divisors (2407195).

66532253 is a wasteful number, since it uses less digits than its factorization.

66532253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16063.

The product of its digits is 32400, while the sum is 32.

The square root of 66532253 is about 8156.7305337372. The cubic root of 66532253 is about 405.2074393300.

The spelling of 66532253 in words is "sixty-six million, five hundred thirty-two thousand, two hundred fifty-three".