67420945779650 has 24 divisors (see below), whose sum is σ = 126039522412980. Its totient is φ = 26831482986560.

The previous prime is 67420945779643. The next prime is 67420945779661. The reversal of 67420945779650 is 5697754902476.

It can be written as a sum of positive squares in 6 ways, for example, as 52256315695609 + 15164630084041 = 7228853^2 + 3894179^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3422373185 + ... + 3422392884.

Almost surely, 2^{67420945779650} is an apocalyptic number.

67420945779650 is a deficient number, since it is larger than the sum of its proper divisors (58618576633330).

67420945779650 is a wasteful number, since it uses less digits than its factorization.

67420945779650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6844766278 (or 6844766273 counting only the distinct ones).

The product of its (nonzero) digits is 800150400, while the sum is 71.

The spelling of 67420945779650 in words is "sixty-seven trillion, four hundred twenty billion, nine hundred forty-five million, seven hundred seventy-nine thousand, six hundred fifty".