73420808066820 has 60 divisors (see below), whose sum is σ = 230323794199884. Its totient is φ = 19578882150720.

The previous prime is 73420808066813. The next prime is 73420808066863. The reversal of 73420808066820 is 2866080802437.

73420808066820 is a `hidden beast` number, since 7 + 3 + 420 + 8 + 0 + 80 + 66 + 82 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16933949247744 + 56486858819076 = 4115088^2 + 7515774^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22660741611 + ... + 22660744850.

Almost surely, 2^{73420808066820} is an apocalyptic number.

It is an amenable number.

73420808066820 is an abundant number, since it is smaller than the sum of its proper divisors (156902986133064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73420808066820 is a wasteful number, since it uses less digits than its factorization.

73420808066820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45321486482 (or 45321486471 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 73420808066820 in words is "seventy-three trillion, four hundred twenty billion, eight hundred eight million, sixty-six thousand, eight hundred twenty".