32664257 has 4 divisors (see below), whose sum is σ = 32746116. Its totient is φ = 32582400.

The previous prime is 32664253. The next prime is 32664263. The reversal of 32664257 is 75246623.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21381376 + 11282881 = 4624^2 + 3359^2 .

It is a cyclic number.

It is not a de Polignac number, because 32664257 - 2² = 32664253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32664251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40328 + ... + 41129.

It is an arithmetic number, because the mean of its divisors is an integer number (8186529).

Almost surely, 2^32664257 is an apocalyptic number.

It is an amenable number.

32664257 is a deficient number, since it is larger than the sum of its proper divisors (81859).

32664257 is an equidigital number, since it uses as much as digits as its factorization.

32664257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81858.

The product of its digits is 60480, while the sum is 35.

The square root of 32664257 is about 5715.2652606856. The cubic root of 32664257 is about 319.6619379040.

The spelling of 32664257 in words is "thirty-two million, six hundred sixty-four thousand, two hundred fifty-seven".