55866806 has 4 divisors (see below), whose sum is σ = 83800212. Its totient is φ = 27933402.

The previous prime is 55866803. The next prime is 55866809. The reversal of 55866806 is 60866855.

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

It is an interprime number because it is at equal distance from previous prime (55866803) and next prime (55866809).

It is a super-2 number, since 2×55866806² = 6242200025283272, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55866803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13966700 + ... + 13966703.

It is an arithmetic number, because the mean of its divisors is an integer number (20950053).

Almost surely, 2^55866806 is an apocalyptic number.

55866806 is a deficient number, since it is larger than the sum of its proper divisors (27933406).

55866806 is a wasteful number, since it uses less digits than its factorization.

55866806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27933405.

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

The square root of 55866806 is about 7474.4100770562. The cubic root of 55866806 is about 382.2826731890.

The spelling of 55866806 in words is "fifty-five million, eight hundred sixty-six thousand, eight hundred six".