667231536677 has 2 divisors, whose sum is σ = 667231536678. Its totient is φ = 667231536676.

The previous prime is 667231536577. The next prime is 667231536703. The reversal of 667231536677 is 776635132766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 410318394721 + 256913141956 = 640561^2 + 506866^2 .

It is a cyclic number.

It is not a de Polignac number, because 667231536677 - 2⁸ = 667231536421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667231536577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333615768338 + 333615768339.

It is an arithmetic number, because the mean of its divisors is an integer number (333615768339).

Almost surely, 2^667231536677 is an apocalyptic number.

It is an amenable number.

667231536677 is a deficient number, since it is larger than the sum of its proper divisors (1).

667231536677 is an equidigital number, since it uses as much as digits as its factorization.

667231536677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40007520, while the sum is 59.

The spelling of 667231536677 in words is "six hundred sixty-seven billion, two hundred thirty-one million, five hundred thirty-six thousand, six hundred seventy-seven".