66624535506 has 32 divisors (see below), whose sum is σ = 134070095808. Its totient is φ = 22071439040.

The previous prime is 66624535499. The next prime is 66624535507. The reversal of 66624535506 is 60553542666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66624535507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3114760 + ... + 3136076.

It is an arithmetic number, because the mean of its divisors is an integer number (4189690494).

Almost surely, 2^66624535506 is an apocalyptic number.

66624535506 is an abundant number, since it is smaller than the sum of its proper divisors (67445560302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66624535506 is a wasteful number, since it uses less digits than its factorization.

66624535506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24506.

The product of its (nonzero) digits is 3888000, while the sum is 48.

The spelling of 66624535506 in words is "sixty-six billion, six hundred twenty-four million, five hundred thirty-five thousand, five hundred six".