66817127580504 has 32 divisors (see below), whose sum is σ = 190906078801920. Its totient is φ = 19090607880096.

The previous prime is 66817127580503. The next prime is 66817127580559. The reversal of 66817127580504 is 40508572171866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66817127580503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198860498584 + ... + 198860498919.

It is an arithmetic number, because the mean of its divisors is an integer number (5965814962560).

Almost surely, 2^{66817127580504} is an apocalyptic number.

It is an amenable number.

66817127580504 is an abundant number, since it is smaller than the sum of its proper divisors (124088951221416).

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

66817127580504 is a wasteful number, since it uses less digits than its factorization.

66817127580504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397720997519 (or 397720997515 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 60.

The spelling of 66817127580504 in words is "sixty-six trillion, eight hundred seventeen billion, one hundred twenty-seven million, five hundred eighty thousand, five hundred four".