1866228066 has 16 divisors (see below), whose sum is σ = 4147173600. Its totient is φ = 622076004.

The previous prime is 1866228041. The next prime is 1866228121. The reversal of 1866228066 is 6608226681.

1866228066 is a `hidden beast` number, since 18 + 6 + 622 + 8 + 0 + 6 + 6 = 666.

1866228066 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1866228066² = 6965614388652200712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17279836 + ... + 17279943.

It is an arithmetic number, because the mean of its divisors is an integer number (259198350).

Almost surely, 2^1866228066 is an apocalyptic number.

1866228066 is an abundant number, since it is smaller than the sum of its proper divisors (2280945534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1866228066 is a wasteful number, since it uses less digits than its factorization.

1866228066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34559790 (or 34559784 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 1866228066 is about 43199.8618747792. The cubic root of 1866228066 is about 1231.1800572635.

The spelling of 1866228066 in words is "one billion, eight hundred sixty-six million, two hundred twenty-eight thousand, sixty-six".