55820066 has 8 divisors (see below), whose sum is σ = 83767980. Its totient is φ = 27897408.

The previous prime is 55820053. The next prime is 55820071. The reversal of 55820066 is 66002855.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55815841 + 4225 = 7471^2 + 65^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830 + ... + 10598.

Almost surely, 2^55820066 is an apocalyptic number.

55820066 is a deficient number, since it is larger than the sum of its proper divisors (27947914).

55820066 is a wasteful number, since it uses less digits than its factorization.

55820066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12628.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 55820066 is about 7471.2827546547. The cubic root of 55820066 is about 382.1760333749.

The spelling of 55820066 in words is "fifty-five million, eight hundred twenty thousand, sixty-six".