66163866 has 8 divisors (see below), whose sum is σ = 132327744. Its totient is φ = 22054620.

The previous prime is 66163831. The next prime is 66163883. The reversal of 66163866 is 66836166.

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

66163866 is an admirable number.

It is a Curzon number.

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, 5513650 + ... + 5513661.

It is an arithmetic number, because the mean of its divisors is an integer number (16540968).

Almost surely, 2^66163866 is an apocalyptic number.

66163866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66163866 is a wasteful number, since it uses less digits than its factorization.

66163866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11027316.

The product of its digits is 186624, while the sum is 42.

The square root of 66163866 is about 8134.1174075618. The cubic root of 66163866 is about 404.4581811194.

The spelling of 66163866 in words is "sixty-six million, one hundred sixty-three thousand, eight hundred sixty-six".