66545866 has 8 divisors (see below), whose sum is σ = 105072480. Its totient is φ = 31521708.

The previous prime is 66545819. The next prime is 66545893. The reversal of 66545866 is 66854566.

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, 875566 + ... + 875641.

It is an arithmetic number, because the mean of its divisors is an integer number (13134060).

Almost surely, 2^66545866 is an apocalyptic number.

66545866 is a deficient number, since it is larger than the sum of its proper divisors (38526614).

66545866 is a wasteful number, since it uses less digits than its factorization.

66545866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751228.

The product of its digits is 1036800, while the sum is 46.

The square root of 66545866 is about 8157.5649553038. The cubic root of 66545866 is about 405.2350736099.

The spelling of 66545866 in words is "sixty-six million, five hundred forty-five thousand, eight hundred sixty-six".