66165018435424 has 12 divisors (see below), whose sum is σ = 130262380044804. Its totient is φ = 33082509217696.

The previous prime is 66165018435419. The next prime is 66165018435427. The reversal of 66165018435424 is 42453481056166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66165018435427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033828413022 + ... + 1033828413085.

It is an arithmetic number, because the mean of its divisors is an integer number (10855198337067).

Almost surely, 2^{66165018435424} is an apocalyptic number.

It is an amenable number.

66165018435424 is a deficient number, since it is larger than the sum of its proper divisors (64097361609380).

66165018435424 is a wasteful number, since it uses less digits than its factorization.

66165018435424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067656826117 (or 2067656826109 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 55.

The spelling of 66165018435424 in words is "sixty-six trillion, one hundred sixty-five billion, eighteen million, four hundred thirty-five thousand, four hundred twenty-four".