66449919429124 has 243 divisors, whose sum is σ = 152350610103783. Its totient is φ = 25266953527200.

The previous prime is 66449919429083. The next prime is 66449919429137. The reversal of 66449919429124 is 42192491994466.

The square root of 66449919429124 is 8151682.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 53980437589 + ... + 53980438819.

Almost surely, 2^{66449919429124} is an apocalyptic number.

66449919429124 is the 8151682-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66449919429124

66449919429124 is an abundant number, since it is smaller than the sum of its proper divisors (85900690674659).

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

66449919429124 is a wasteful number, since it uses less digits than its factorization.

66449919429124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588 (or 1294 counting only the distinct ones).

The product of its digits is 241864704, while the sum is 70.

The spelling of 66449919429124 in words is "sixty-six trillion, four hundred forty-nine billion, nine hundred nineteen million, four hundred twenty-nine thousand, one hundred twenty-four".