66051147205 has 8 divisors (see below), whose sum is σ = 79345613304. Its totient is φ = 52784760000.

The previous prime is 66051147203. The next prime is 66051147221. The reversal of 66051147205 is 50274115066.

It is a happy number.

66051147205 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 4 ways, for example, as 19694473569 + 46356673636 = 140337^2 + 215306^2 .

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

It is not a de Polignac number, because 66051147205 - 2¹ = 66051147203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66051147203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7014546 + ... + 7023955.

It is an arithmetic number, because the mean of its divisors is an integer number (9918201663).

Almost surely, 2^66051147205 is an apocalyptic number.

It is an amenable number.

66051147205 is a deficient number, since it is larger than the sum of its proper divisors (13294466099).

66051147205 is a wasteful number, since it uses less digits than its factorization.

66051147205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14039447.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 66051147205 in words is "sixty-six billion, fifty-one million, one hundred forty-seven thousand, two hundred five".