32556661 has 4 divisors (see below), whose sum is σ = 33972192. Its totient is φ = 31141132.

The previous prime is 32556593. The next prime is 32556673. The reversal of 32556661 is 16665523.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 32556661 - 2⁷ = 32556533 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 (32556691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707731 + ... + 707776.

It is an arithmetic number, because the mean of its divisors is an integer number (8493048).

Almost surely, 2^32556661 is an apocalyptic number.

It is an amenable number.

32556661 is a deficient number, since it is larger than the sum of its proper divisors (1415531).

32556661 is a wasteful number, since it uses less digits than its factorization.

32556661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415530.

The product of its digits is 32400, while the sum is 34.

The square root of 32556661 is about 5705.8444598499. The cubic root of 32556661 is about 319.3105632081.

The spelling of 32556661 in words is "thirty-two million, five hundred fifty-six thousand, six hundred sixty-one".