67374003721 has 2 divisors, whose sum is σ = 67374003722. Its totient is φ = 67374003720.

The previous prime is 67374003677. The next prime is 67374003731. The reversal of 67374003721 is 12730047376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37195365321 + 30178638400 = 192861^2 + 173720^2 .

It is a cyclic number.

It is not a de Polignac number, because 67374003721 - 2¹³ = 67373995529 is a prime.

It is not a weakly prime, because it can be changed into another prime (67374003731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33687001860 + 33687001861.

It is an arithmetic number, because the mean of its divisors is an integer number (33687001861).

Almost surely, 2^67374003721 is an apocalyptic number.

It is an amenable number.

67374003721 is a deficient number, since it is larger than the sum of its proper divisors (1).

67374003721 is an equidigital number, since it uses as much as digits as its factorization.

67374003721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 40.

The spelling of 67374003721 in words is "sixty-seven billion, three hundred seventy-four million, three thousand, seven hundred twenty-one".