55677720 has 192 divisors, whose sum is σ = 206102880. Its totient is φ = 11956224.

The previous prime is 55677697. The next prime is 55677761. The reversal of 55677720 is 2777655.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99682 + ... + 100238.

Almost surely, 2^55677720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55677720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103051440).

55677720 is an abundant number, since it is smaller than the sum of its proper divisors (150425160).

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

55677720 is a wasteful number, since it uses less digits than its factorization.

55677720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 102900, while the sum is 39.

The square root of 55677720 is about 7461.7504648708. The cubic root of 55677720 is about 381.8508961868.

The spelling of 55677720 in words is "fifty-five million, six hundred seventy-seven thousand, seven hundred twenty".