66655434825243 has 96 divisors (see below), whose sum is σ = 106646957733888. Its totient is φ = 39778289740800.

The previous prime is 66655434825227. The next prime is 66655434825253. The reversal of 66655434825243 is 34252843455666.

It is not a de Polignac number, because 66655434825243 - 2⁴ = 66655434825227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66655434825253) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18984741858 + ... + 18984745368.

It is an arithmetic number, because the mean of its divisors is an integer number (1110905809728).

Almost surely, 2^{66655434825243} is an apocalyptic number.

66655434825243 is a deficient number, since it is larger than the sum of its proper divisors (39991522908645).

66655434825243 is a wasteful number, since it uses less digits than its factorization.

66655434825243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7177 (or 7174 counting only the distinct ones).

The product of its digits is 497664000, while the sum is 63.

The spelling of 66655434825243 in words is "sixty-six trillion, six hundred fifty-five billion, four hundred thirty-four million, eight hundred twenty-five thousand, two hundred forty-three".