67400740621 has 2 divisors, whose sum is σ = 67400740622. Its totient is φ = 67400740620.

The previous prime is 67400740579. The next prime is 67400740663. The reversal of 67400740621 is 12604700476.

It is a balanced prime because it is at equal distance from previous prime (67400740579) and next prime (67400740663).

It can be written as a sum of positive squares in only one way, i.e., 66713724100 + 687016521 = 258290^2 + 26211^2 .

It is a cyclic number.

It is not a de Polignac number, because 67400740621 - 2⁷ = 67400740493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67400710621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33700370310 + 33700370311.

It is an arithmetic number, because the mean of its divisors is an integer number (33700370311).

Almost surely, 2^67400740621 is an apocalyptic number.

It is an amenable number.

67400740621 is a deficient number, since it is larger than the sum of its proper divisors (1).

67400740621 is an equidigital number, since it uses as much as digits as its factorization.

67400740621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 67400740621 in words is "sixty-seven billion, four hundred million, seven hundred forty thousand, six hundred twenty-one".