32661563 has 4 divisors (see below), whose sum is σ = 35630808. Its totient is φ = 29692320.

The previous prime is 32661557. The next prime is 32661571. The reversal of 32661563 is 36516623.

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

It is a cyclic number.

It is not a de Polignac number, because 32661563 - 2⁴ = 32661547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32661533) 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, 1484606 + ... + 1484627.

It is an arithmetic number, because the mean of its divisors is an integer number (8907702).

Almost surely, 2^32661563 is an apocalyptic number.

32661563 is a deficient number, since it is larger than the sum of its proper divisors (2969245).

32661563 is a wasteful number, since it uses less digits than its factorization.

32661563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2969244.

The product of its digits is 19440, while the sum is 32.

The square root of 32661563 is about 5715.0295712271. The cubic root of 32661563 is about 319.6531495726.

The spelling of 32661563 in words is "thirty-two million, six hundred sixty-one thousand, five hundred sixty-three".