55406668 has 12 divisors (see below), whose sum is σ = 97175232. Its totient is φ = 27642320.

The previous prime is 55406657. The next prime is 55406669. The reversal of 55406668 is 86660455.

It is a self number, because there is not a number n which added to its sum of digits gives 55406668.

It is not an unprimeable number, because it can be changed into a prime (55406669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13180 + ... + 16867.

It is an arithmetic number, because the mean of its divisors is an integer number (8097936).

Almost surely, 2^55406668 is an apocalyptic number.

It is an amenable number.

55406668 is a deficient number, since it is larger than the sum of its proper divisors (41768564).

55406668 is a wasteful number, since it uses less digits than its factorization.

55406668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30512 (or 30510 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 55406668 is about 7443.5655434744. The cubic root of 55406668 is about 381.2302418140.

The spelling of 55406668 in words is "fifty-five million, four hundred six thousand, six hundred sixty-eight".