73520663 has 4 divisors (see below), whose sum is σ = 74207880. Its totient is φ = 72833448.

The previous prime is 73520651. The next prime is 73520701. The reversal of 73520663 is 36602537.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36602537 = 31 ⋅1180727.

It is a cyclic number.

It is not a de Polignac number, because 73520663 - 2⁶ = 73520599 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 (73520263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343448 + ... + 343661.

It is an arithmetic number, because the mean of its divisors is an integer number (18551970).

Almost surely, 2^73520663 is an apocalyptic number.

73520663 is a deficient number, since it is larger than the sum of its proper divisors (687217).

73520663 is a wasteful number, since it uses less digits than its factorization.

73520663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687216.

The product of its (nonzero) digits is 22680, while the sum is 32.

The square root of 73520663 is about 8574.4191056887. The cubic root of 73520663 is about 418.9251864307.

The spelling of 73520663 in words is "seventy-three million, five hundred twenty thousand, six hundred sixty-three".