55680866 has 4 divisors (see below), whose sum is σ = 83521302. Its totient is φ = 27840432.

The previous prime is 55680857. The next prime is 55680869. The reversal of 55680866 is 66808655.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46854025 + 8826841 = 6845^2 + 2971^2 .

It is not an unprimeable number, because it can be changed into a prime (55680869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13920215 + ... + 13920218.

Almost surely, 2^55680866 is an apocalyptic number.

55680866 is a deficient number, since it is larger than the sum of its proper divisors (27840436).

55680866 is a wasteful number, since it uses less digits than its factorization.

55680866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27840435.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 55680866 is about 7461.9612703364. The cubic root of 55680866 is about 381.8580880540.

The spelling of 55680866 in words is "fifty-five million, six hundred eighty thousand, eight hundred sixty-six".