66434414994 has 48 divisors (see below), whose sum is σ = 144519448320. Its totient is φ = 22056027840.

The previous prime is 66434414987. The next prime is 66434414999. The reversal of 66434414994 is 49941443466.

66434414994 is a `hidden beast` number, since 66 + 434 + 4 + 149 + 9 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 66434414994.

It is not an unprimeable number, because it can be changed into a prime (66434414999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4779747 + ... + 4793625.

It is an arithmetic number, because the mean of its divisors is an integer number (3010821840).

Almost surely, 2^66434414994 is an apocalyptic number.

66434414994 is an abundant number, since it is smaller than the sum of its proper divisors (78085033326).

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

66434414994 is a wasteful number, since it uses less digits than its factorization.

66434414994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14935 (or 14932 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 54.

The spelling of 66434414994 in words is "sixty-six billion, four hundred thirty-four million, four hundred fourteen thousand, nine hundred ninety-four".