55837661 has 4 divisors (see below), whose sum is σ = 60913824. Its totient is φ = 50761500.

The previous prime is 55837657. The next prime is 55837679. The reversal of 55837661 is 16673855.

55837661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55837661 - 2² = 55837657 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 (55837681) 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, 2538065 + ... + 2538086.

It is an arithmetic number, because the mean of its divisors is an integer number (15228456).

Almost surely, 2^55837661 is an apocalyptic number.

It is an amenable number.

55837661 is a deficient number, since it is larger than the sum of its proper divisors (5076163).

55837661 is a wasteful number, since it uses less digits than its factorization.

55837661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076162.

The product of its digits is 151200, while the sum is 41.

The square root of 55837661 is about 7472.4601705195. The cubic root of 55837661 is about 382.2161842942.

The spelling of 55837661 in words is "fifty-five million, eight hundred thirty-seven thousand, six hundred sixty-one".