55665396 has 18 divisors (see below), whose sum is σ = 140709842. Its totient is φ = 18555120.

The previous prime is 55665391. The next prime is 55665419. The reversal of 55665396 is 69356655.

55665396 is a `hidden beast` number, since 55 + 66 + 539 + 6 = 666.

55665396 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., 45968400 + 9696996 = 6780^2 + 3114^2 .

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 (55665391) 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, 773095 + ... + 773166.

Almost surely, 2^55665396 is an apocalyptic number.

It is an amenable number.

55665396 is an abundant number, since it is smaller than the sum of its proper divisors (85044446).

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

55665396 is a wasteful number, since it uses less digits than its factorization.

55665396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546271 (or 1546266 counting only the distinct ones).

The product of its digits is 729000, while the sum is 45.

The square root of 55665396 is about 7460.9246075805. The cubic root of 55665396 is about 381.8227204779.

The spelling of 55665396 in words is "fifty-five million, six hundred sixty-five thousand, three hundred ninety-six".