66534550321604 has 24 divisors (see below), whose sum is σ = 120515693538240. Its totient is φ = 32102737206176.

The previous prime is 66534550321579. The next prime is 66534550321663. The reversal of 66534550321604 is 40612305543566.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155057462 + ... + 155485965.

It is an arithmetic number, because the mean of its divisors is an integer number (5021487230760).

Almost surely, 2^{66534550321604} is an apocalyptic number.

It is an amenable number.

66534550321604 is a deficient number, since it is larger than the sum of its proper divisors (53981143216636).

66534550321604 is a wasteful number, since it uses less digits than its factorization.

66534550321604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310545307 (or 310545305 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 50.

The spelling of 66534550321604 in words is "sixty-six trillion, five hundred thirty-four billion, five hundred fifty million, three hundred twenty-one thousand, six hundred four".