66301866 has 48 divisors (see below), whose sum is σ = 148262400. Its totient is φ = 21402144.

The previous prime is 66301861. The next prime is 66301867. The reversal of 66301866 is 66810366.

66301866 is a `hidden beast` number, since 6 + 630 + 18 + 6 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66301866.

It is not an unprimeable number, because it can be changed into a prime (66301861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91855 + ... + 92573.

It is an arithmetic number, because the mean of its divisors is an integer number (3088800).

Almost surely, 2^66301866 is an apocalyptic number.

66301866 is an abundant number, since it is smaller than the sum of its proper divisors (81960534).

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

66301866 is a wasteful number, since it uses less digits than its factorization.

66301866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 66301866 is about 8142.5957777603. The cubic root of 66301866 is about 404.7391827803.

The spelling of 66301866 in words is "sixty-six million, three hundred one thousand, eight hundred sixty-six".