66077806 has 4 divisors (see below), whose sum is σ = 99116712. Its totient is φ = 33038902.

The previous prime is 66077797. The next prime is 66077813. The reversal of 66077806 is 60877066.

66077806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 16519450 + ... + 16519453.

It is an arithmetic number, because the mean of its divisors is an integer number (24779178).

Almost surely, 2^66077806 is an apocalyptic number.

66077806 is a deficient number, since it is larger than the sum of its proper divisors (33038906).

66077806 is a wasteful number, since it uses less digits than its factorization.

66077806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33038905.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 66077806 is about 8128.8256224377. The cubic root of 66077806 is about 404.2827441039.

The spelling of 66077806 in words is "sixty-six million, seventy-seven thousand, eight hundred six".