66225420744528 has 80 divisors (see below), whose sum is σ = 172479074311296. Its totient is φ = 21895363852800.

The previous prime is 66225420744449. The next prime is 66225420744533. The reversal of 66225420744528 is 82544702452266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2263275 + ... + 11729162.

Almost surely, 2^{66225420744528} is an apocalyptic number.

It is an amenable number.

66225420744528 is an abundant number, since it is smaller than the sum of its proper divisors (106253653566768).

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

66225420744528 is a wasteful number, since it uses less digits than its factorization.

66225420744528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13993252 (or 13993246 counting only the distinct ones).

The product of its (nonzero) digits is 51609600, while the sum is 57.

The spelling of 66225420744528 in words is "sixty-six trillion, two hundred twenty-five billion, four hundred twenty million, seven hundred forty-four thousand, five hundred twenty-eight".