66308489624 has 32 divisors (see below), whose sum is σ = 134044997520. Its totient is φ = 30568980096.

The previous prime is 66308489593. The next prime is 66308489627. The reversal of 66308489624 is 42698480366.

It is a happy number.

It is a super-2 number, since 2×66308489624² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66308489624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66308489627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272294 + ... + 454709.

Almost surely, 2^66308489624 is an apocalyptic number.

It is an amenable number.

66308489624 is an abundant number, since it is smaller than the sum of its proper divisors (67736507896).

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

66308489624 is a wasteful number, since it uses less digits than its factorization.

66308489624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727899 (or 727895 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 56.

The spelling of 66308489624 in words is "sixty-six billion, three hundred eight million, four hundred eighty-nine thousand, six hundred twenty-four".