66441016351 has 4 divisors (see below), whose sum is σ = 66483310104. Its totient is φ = 66398722600.

The previous prime is 66441016349. The next prime is 66441016379. The reversal of 66441016351 is 15361014466.

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

It is a cyclic number.

It is not a de Polignac number, because 66441016351 - 2¹ = 66441016349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66441016351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66441016331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21144520 + ... + 21147661.

It is an arithmetic number, because the mean of its divisors is an integer number (16620827526).

Almost surely, 2^66441016351 is an apocalyptic number.

66441016351 is a deficient number, since it is larger than the sum of its proper divisors (42293753).

66441016351 is a wasteful number, since it uses less digits than its factorization.

66441016351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42293752.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 66441016351 in words is "sixty-six billion, four hundred forty-one million, sixteen thousand, three hundred fifty-one".