55655661 has 8 divisors (see below), whose sum is σ = 75786624. Its totient is φ = 36314240.

The previous prime is 55655647. The next prime is 55655687. The reversal of 55655661 is 16655655.

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 55655661 - 2⁷ = 55655533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55665661) 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, 197220 + ... + 197501.

It is an arithmetic number, because the mean of its divisors is an integer number (9473328).

Almost surely, 2^55655661 is an apocalyptic number.

It is an amenable number.

55655661 is a deficient number, since it is larger than the sum of its proper divisors (20130963).

55655661 is a wasteful number, since it uses less digits than its factorization.

55655661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394771.

The product of its digits is 135000, while the sum is 39.

The square root of 55655661 is about 7460.2721800213. The cubic root of 55655661 is about 381.8004609226.

The spelling of 55655661 in words is "fifty-five million, six hundred fifty-five thousand, six hundred sixty-one".