66350550553629 has 16 divisors (see below), whose sum is σ = 89358956269440. Its totient is φ = 43788649222080.

The previous prime is 66350550553591. The next prime is 66350550553633. The reversal of 66350550553629 is 92635505505366.

It is not a de Polignac number, because 66350550553629 - 2¹⁵ = 66350550520861 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66350550513629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90461457 + ... + 91191974.

It is an arithmetic number, because the mean of its divisors is an integer number (5584934766840).

Almost surely, 2^{66350550553629} is an apocalyptic number.

It is an amenable number.

66350550553629 is a deficient number, since it is larger than the sum of its proper divisors (23008405715811).

66350550553629 is a wasteful number, since it uses less digits than its factorization.

66350550553629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181654660.

The product of its (nonzero) digits is 109350000, while the sum is 60.

The spelling of 66350550553629 in words is "sixty-six trillion, three hundred fifty billion, five hundred fifty million, five hundred fifty-three thousand, six hundred twenty-nine".