66267309874 has 4 divisors (see below), whose sum is σ = 99400964814. Its totient is φ = 33133654936.

The previous prime is 66267309863. The next prime is 66267309877. The reversal of 66267309874 is 47890376266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47890376266 = 2 ⋅23945188133.

It can be written as a sum of positive squares in only one way, i.e., 57996680625 + 8270629249 = 240825^2 + 90943^2 .

It is not an unprimeable number, because it can be changed into a prime (66267309877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16566827467 + ... + 16566827470.

Almost surely, 2^66267309874 is an apocalyptic number.

66267309874 is a deficient number, since it is larger than the sum of its proper divisors (33133654940).

66267309874 is a wasteful number, since it uses less digits than its factorization.

66267309874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33133654939.

The product of its (nonzero) digits is 18289152, while the sum is 58.

The spelling of 66267309874 in words is "sixty-six billion, two hundred sixty-seven million, three hundred nine thousand, eight hundred seventy-four".