66547031004 has 60 divisors (see below), whose sum is σ = 183123263400. Its totient is φ = 21014849952.

The previous prime is 66547030943. The next prime is 66547031011. The reversal of 66547031004 is 40013074566.

It is a happy number.

66547031004 is a `hidden beast` number, since 6 + 6 + 547 + 0 + 3 + 100 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 66547031004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5398899 + ... + 5411210.

It is an arithmetic number, because the mean of its divisors is an integer number (3052054390).

Almost surely, 2^66547031004 is an apocalyptic number.

It is an amenable number.

66547031004 is an abundant number, since it is smaller than the sum of its proper divisors (116576232396).

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

66547031004 is a wasteful number, since it uses less digits than its factorization.

66547031004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10810144 (or 10810133 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 66547031004 in words is "sixty-six billion, five hundred forty-seven million, thirty-one thousand, four".