670811804181 has 24 divisors (see below), whose sum is σ = 1040001557400. Its totient is φ = 415135742976.

The previous prime is 670811804171. The next prime is 670811804261. The reversal of 670811804181 is 181408118076.

It can be written as a sum of positive squares in 4 ways, for example, as 189543553956 + 481268250225 = 435366^2 + 693735^2 .

It is not a de Polignac number, because 670811804181 - 2⁵ = 670811804149 is a prime.

It is a super-2 number, since 2×670811804181² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670811804171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30018906 + ... + 30041243.

It is an arithmetic number, because the mean of its divisors is an integer number (43333398225).

Almost surely, 2^670811804181 is an apocalyptic number.

It is an amenable number.

670811804181 is a deficient number, since it is larger than the sum of its proper divisors (369189753219).

670811804181 is a wasteful number, since it uses less digits than its factorization.

670811804181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60060245 (or 60060242 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 45.

The spelling of 670811804181 in words is "six hundred seventy billion, eight hundred eleven million, eight hundred four thousand, one hundred eighty-one".