667252029487 has 2 divisors, whose sum is σ = 667252029488. Its totient is φ = 667252029486.

The previous prime is 667252029461. The next prime is 667252029497. The reversal of 667252029487 is 784920252766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667252029487 - 2¹¹ = 667252027439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667252029427) 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 as a sum of consecutive naturals, namely, 333626014743 + 333626014744.

It is an arithmetic number, because the mean of its divisors is an integer number (333626014744).

Almost surely, 2^667252029487 is an apocalyptic number.

667252029487 is a deficient number, since it is larger than the sum of its proper divisors (1).

667252029487 is an equidigital number, since it uses as much as digits as its factorization.

667252029487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 667252029487 in words is "six hundred sixty-seven billion, two hundred fifty-two million, twenty-nine thousand, four hundred eighty-seven".