55660212 has 18 divisors (see below), whose sum is σ = 140696738. Its totient is φ = 18553392.

The previous prime is 55660211. The next prime is 55660219. The reversal of 55660212 is 21206655.

55660212 is a `hidden beast` number, since 5 + 56 + 602 + 1 + 2 = 666.

55660212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 43086096 + 12574116 = 6564^2 + 3546^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55660211) 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 5 ways as a sum of consecutive naturals, for example, 773023 + ... + 773094.

Almost surely, 2^55660212 is an apocalyptic number.

It is an amenable number.

55660212 is an abundant number, since it is smaller than the sum of its proper divisors (85036526).

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

55660212 is a wasteful number, since it uses less digits than its factorization.

55660212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546127 (or 1546122 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 55660212 is about 7460.5771894673. The cubic root of 55660212 is about 381.8108673305.

Adding to 55660212 its reverse (21206655), we get a palindrome (76866867).

The spelling of 55660212 in words is "fifty-five million, six hundred sixty thousand, two hundred twelve".