66429193344 has 32 divisors (see below), whose sum is σ = 176452545840. Its totient is φ = 22143064320.

The previous prime is 66429193343. The next prime is 66429193361. The reversal of 66429193344 is 44339192466.

It is a tau number, because it is divible by the number of its divisors (32).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66429193343) 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 3 ways as a sum of consecutive naturals, for example, 86495962 + ... + 86496729.

Almost surely, 2^66429193344 is an apocalyptic number.

66429193344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66429193344 is an abundant number, since it is smaller than the sum of its proper divisors (110023352496).

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

66429193344 is a wasteful number, since it uses less digits than its factorization.

66429193344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172992708 (or 172992696 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 51.

The spelling of 66429193344 in words is "sixty-six billion, four hundred twenty-nine million, one hundred ninety-three thousand, three hundred forty-four".