66715322460 has 48 divisors (see below), whose sum is σ = 186899076000. Its totient is φ = 17781593344.

The previous prime is 66715322449. The next prime is 66715322489. The reversal of 66715322460 is 6422351766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168315 + ... + 402194.

It is an arithmetic number, because the mean of its divisors is an integer number (3893730750).

Almost surely, 2^66715322460 is an apocalyptic number.

66715322460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66715322460 is an abundant number, since it is smaller than the sum of its proper divisors (120183753540).

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

66715322460 is a wasteful number, since it uses less digits than its factorization.

66715322460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572470 (or 572468 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 66715322460 in words is "sixty-six billion, seven hundred fifteen million, three hundred twenty-two thousand, four hundred sixty".