55661080 has 32 divisors (see below), whose sum is σ = 125508240. Its totient is φ = 22216320.

The previous prime is 55661071. The next prime is 55661083. The reversal of 55661080 is 8016655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55661083) 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, 21622 + ... + 24058.

Almost surely, 2^55661080 is an apocalyptic number.

It is an amenable number.

55661080 is an abundant number, since it is smaller than the sum of its proper divisors (69847160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55661080 is a wasteful number, since it uses less digits than its factorization.

55661080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019 (or 3015 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 55661080 is about 7460.6353616833. The cubic root of 55661080 is about 381.8128520523.

The spelling of 55661080 in words is "fifty-five million, six hundred sixty-one thousand, eighty".