55660100 has 18 divisors (see below), whose sum is σ = 120782634. Its totient is φ = 22264000.

The previous prime is 55660093. The next prime is 55660109. The reversal of 55660100 is 106655.

It can be written as a sum of positive squares in 3 ways, for example, as 8655364 + 47004736 = 2942^2 + 6856^2 .

It is not an unprimeable number, because it can be changed into a prime (55660109) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 278201 + ... + 278400.

Almost surely, 2^55660100 is an apocalyptic number.

55660100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55660100 is an abundant number, since it is smaller than the sum of its proper divisors (65122534).

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

55660100 is a wasteful number, since it uses less digits than its factorization.

55660100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556615 (or 556608 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 55660100 is about 7460.5696833419. The cubic root of 55660100 is about 381.8106112359.

Adding to 55660100 its reverse (106655), we get a palindrome (55766755).

The spelling of 55660100 in words is "fifty-five million, six hundred sixty thousand, one hundred".