667406740037 has 4 divisors (see below), whose sum is σ = 685444760076. Its totient is φ = 649368720000.

The previous prime is 667406740001. The next prime is 667406740067. The reversal of 667406740037 is 730047604766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 329201685121 + 338205054916 = 573761^2 + 581554^2 .

It is a cyclic number.

It is not a de Polignac number, because 667406740037 - 2⁶ = 667406739973 is a prime.

It is a super-5 number, since 5×667406740037⁵ (a number of 60 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667406740067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9019009964 + ... + 9019010037.

It is an arithmetic number, because the mean of its divisors is an integer number (171361190019).

Almost surely, 2^667406740037 is an apocalyptic number.

It is an amenable number.

667406740037 is a deficient number, since it is larger than the sum of its proper divisors (18038020039).

667406740037 is a wasteful number, since it uses less digits than its factorization.

667406740037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18038020038.

The product of its (nonzero) digits is 3556224, while the sum is 50.

The spelling of 667406740037 in words is "six hundred sixty-seven billion, four hundred six million, seven hundred forty thousand, thirty-seven".