66153768443 has 12 divisors (see below), whose sum is σ = 77101553880. Its totient is φ = 56594788992.

The previous prime is 66153768437. The next prime is 66153768479. The reversal of 66153768443 is 34486735166.

It is not a de Polignac number, because 66153768443 - 2¹⁴ = 66153752059 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66153768143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1265078 + ... + 1316331.

It is an arithmetic number, because the mean of its divisors is an integer number (6425129490).

Almost surely, 2^66153768443 is an apocalyptic number.

66153768443 is a deficient number, since it is larger than the sum of its proper divisors (10947785437).

66153768443 is a wasteful number, since it uses less digits than its factorization.

66153768443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581946 (or 2581939 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 53.

The spelling of 66153768443 in words is "sixty-six billion, one hundred fifty-three million, seven hundred sixty-eight thousand, four hundred forty-three".