66351266 has 4 divisors (see below), whose sum is σ = 99526902. Its totient is φ = 33175632.

The previous prime is 66351247. The next prime is 66351281. The reversal of 66351266 is 66215366.

66351266 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 can be written as a sum of positive squares in only one way, i.e., 47210641 + 19140625 = 6871^2 + 4375^2 .

It is a Curzon 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, 16587815 + ... + 16587818.

Almost surely, 2^66351266 is an apocalyptic number.

66351266 is a deficient number, since it is larger than the sum of its proper divisors (33175636).

66351266 is a wasteful number, since it uses less digits than its factorization.

66351266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33175635.

The product of its digits is 38880, while the sum is 35.

The square root of 66351266 is about 8145.6286436346. The cubic root of 66351266 is about 404.8396784534.

The spelling of 66351266 in words is "sixty-six million, three hundred fifty-one thousand, two hundred sixty-six".