667502081377 has 2 divisors, whose sum is σ = 667502081378. Its totient is φ = 667502081376.

The previous prime is 667502081359. The next prime is 667502081381. The reversal of 667502081377 is 773180205766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 651960968481 + 15541112896 = 807441^2 + 124664^2 .

It is a cyclic number.

It is not a de Polignac number, because 667502081377 - 2⁷ = 667502081249 is a prime.

It is a super-2 number, since 2×667502081377² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (667502081347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333751040688 + 333751040689.

It is an arithmetic number, because the mean of its divisors is an integer number (333751040689).

Almost surely, 2^667502081377 is an apocalyptic number.

It is an amenable number.

667502081377 is a deficient number, since it is larger than the sum of its proper divisors (1).

667502081377 is an equidigital number, since it uses as much as digits as its factorization.

667502081377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 667502081377 in words is "six hundred sixty-seven billion, five hundred two million, eighty-one thousand, three hundred seventy-seven".