55666616 has 16 divisors (see below), whose sum is σ = 105173640. Its totient is φ = 27620320.

The previous prime is 55666613. The next prime is 55666621. The reversal of 55666616 is 61666655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55666613) 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, 25511 + ... + 27606.

Almost surely, 2^55666616 is an apocalyptic number.

It is an amenable number.

55666616 is a deficient number, since it is larger than the sum of its proper divisors (49507024).

55666616 is a wasteful number, since it uses less digits than its factorization.

55666616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53254 (or 53250 counting only the distinct ones).

The product of its digits is 194400, while the sum is 41.

The square root of 55666616 is about 7461.0063664361. The cubic root of 55666616 is about 381.8255098848.

The spelling of 55666616 in words is "fifty-five million, six hundred sixty-six thousand, six hundred sixteen".