55532661 has 4 divisors (see below), whose sum is σ = 74043552. Its totient is φ = 37021772.

The previous prime is 55532639. The next prime is 55532669. The reversal of 55532661 is 16623555.

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 55532661 - 2¹¹ = 55530613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55532669) 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, 9255441 + ... + 9255446.

It is an arithmetic number, because the mean of its divisors is an integer number (18510888).

Almost surely, 2^55532661 is an apocalyptic number.

It is an amenable number.

55532661 is a deficient number, since it is larger than the sum of its proper divisors (18510891).

55532661 is a wasteful number, since it uses less digits than its factorization.

55532661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18510890.

The product of its digits is 27000, while the sum is 33.

The square root of 55532661 is about 7452.0239532626. The cubic root of 55532661 is about 381.5189915350.

The spelling of 55532661 in words is "fifty-five million, five hundred thirty-two thousand, six hundred sixty-one".