66101866 has 8 divisors (see below), whose sum is σ = 99257220. Its totient is φ = 33016128.

The previous prime is 66101837. The next prime is 66101873. The reversal of 66101866 is 66810166.

66101866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 56927025 + 9174841 = 7545^2 + 3029^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14961 + ... + 18868.

Almost surely, 2^66101866 is an apocalyptic number.

66101866 is a deficient number, since it is larger than the sum of its proper divisors (33155354).

66101866 is a wasteful number, since it uses less digits than its factorization.

66101866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34808.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 66101866 is about 8130.3054063178. The cubic root of 66101866 is about 404.3318067825.

The spelling of 66101866 in words is "sixty-six million, one hundred one thousand, eight hundred sixty-six".