73666353511 has 4 divisors (see below), whose sum is σ = 73675107792. Its totient is φ = 73657599232.

The previous prime is 73666353503. The next prime is 73666353533. The reversal of 73666353511 is 11535366637.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11535366637 = 1109 ⋅10401593.

It is a cyclic number.

It is not a de Polignac number, because 73666353511 - 2³ = 73666353503 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 (73666353311) 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, 4364506 + ... + 4381351.

It is an arithmetic number, because the mean of its divisors is an integer number (18418776948).

Almost surely, 2^73666353511 is an apocalyptic number.

73666353511 is a deficient number, since it is larger than the sum of its proper divisors (8754281).

73666353511 is an equidigital number, since it uses as much as digits as its factorization.

73666353511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8754280.

The product of its digits is 1020600, while the sum is 46.

The spelling of 73666353511 in words is "seventy-three billion, six hundred sixty-six million, three hundred fifty-three thousand, five hundred eleven".