667606630526537 has 6 divisors (see below), whose sum is σ = 722911321812942. Its totient is φ = 616252274332032.

The previous prime is 667606630526527. The next prime is 667606630526581. The reversal of 667606630526537 is 735625036606766.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 124837848976 + 667481792677561 = 353324^2 + 25835669^2 .

It is a de Polignac number, because none of the positive numbers 2^k-667606630526537 is a prime.

It is a super-2 number, since 2×667606630526537² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667606630526527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1975167545768 + ... + 1975167546105.

It is an arithmetic number, because the mean of its divisors is an integer number (120485220302157).

Almost surely, 2^{667606630526537} is an apocalyptic number.

It is an amenable number.

667606630526537 is a deficient number, since it is larger than the sum of its proper divisors (55304691286405).

667606630526537 is a wasteful number, since it uses less digits than its factorization.

667606630526537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950335091899 (or 3950335091886 counting only the distinct ones).

The product of its (nonzero) digits is 1028764800, while the sum is 68.

The spelling of 667606630526537 in words is "six hundred sixty-seven trillion, six hundred six billion, six hundred thirty million, five hundred twenty-six thousand, five hundred thirty-seven".