67666190639 has 2 divisors, whose sum is σ = 67666190640. Its totient is φ = 67666190638.

The previous prime is 67666190629. The next prime is 67666190659. The reversal of 67666190639 is 93609166676.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67666190639 - 2²⁴ = 67649413423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67666190629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33833095319 + 33833095320.

It is an arithmetic number, because the mean of its divisors is an integer number (33833095320).

Almost surely, 2^67666190639 is an apocalyptic number.

67666190639 is a deficient number, since it is larger than the sum of its proper divisors (1).

67666190639 is an equidigital number, since it uses as much as digits as its factorization.

67666190639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13226976, while the sum is 59.

The spelling of 67666190639 in words is "sixty-seven billion, six hundred sixty-six million, one hundred ninety thousand, six hundred thirty-nine".