55666678 has 8 divisors (see below), whose sum is σ = 83715840. Its totient is φ = 27761400.

The previous prime is 55666657. The next prime is 55666679. The reversal of 55666678 is 87666655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55666679) 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, 34998 + ... + 36553.

It is an arithmetic number, because the mean of its divisors is an integer number (10464480).

Almost surely, 2^55666678 is an apocalyptic number.

55666678 is a deficient number, since it is larger than the sum of its proper divisors (28049162).

55666678 is a wasteful number, since it uses less digits than its factorization.

55666678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71942.

The product of its digits is 1814400, while the sum is 49.

The square root of 55666678 is about 7461.0105213704. The cubic root of 55666678 is about 381.8256516404.

The spelling of 55666678 in words is "fifty-five million, six hundred sixty-six thousand, six hundred seventy-eight".