66438164060 has 24 divisors (see below), whose sum is σ = 139611817296. Its totient is φ = 26557804160.

The previous prime is 66438164033. The next prime is 66438164071. The reversal of 66438164060 is 6046183466.

It is a congruent number.

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, 1060121 + ... + 1121040.

It is an arithmetic number, because the mean of its divisors is an integer number (5817159054).

Almost surely, 2^66438164060 is an apocalyptic number.

It is an amenable number.

66438164060 is an abundant number, since it is smaller than the sum of its proper divisors (73173653236).

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

66438164060 is a wasteful number, since it uses less digits than its factorization.

66438164060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182693 (or 2182691 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 66438164060 in words is "sixty-six billion, four hundred thirty-eight million, one hundred sixty-four thousand, sixty".