67374299491 has 2 divisors, whose sum is σ = 67374299492. Its totient is φ = 67374299490.

The previous prime is 67374299467. The next prime is 67374299521. The reversal of 67374299491 is 19499247376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67374299491 - 2¹⁷ = 67374168419 is a prime.

It is not a weakly prime, because it can be changed into another prime (67374299191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33687149745 + 33687149746.

It is an arithmetic number, because the mean of its divisors is an integer number (33687149746).

Almost surely, 2^67374299491 is an apocalyptic number.

67374299491 is a deficient number, since it is larger than the sum of its proper divisors (1).

67374299491 is an equidigital number, since it uses as much as digits as its factorization.

67374299491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 61.

The spelling of 67374299491 in words is "sixty-seven billion, three hundred seventy-four million, two hundred ninety-nine thousand, four hundred ninety-one".