73770566405 has 4 divisors (see below), whose sum is σ = 88524679692. Its totient is φ = 59016453120.

The previous prime is 73770566399. The next prime is 73770566447. The reversal of 73770566405 is 50466507737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50466507737 = 313 ⋅161234849.

It can be written as a sum of positive squares in 2 ways, for example, as 41903318209 + 31867248196 = 204703^2 + 178514^2 .

It is not a de Polignac number, because 73770566405 - 2⁶ = 73770566341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7377056636 + ... + 7377056645.

It is an arithmetic number, because the mean of its divisors is an integer number (22131169923).

Almost surely, 2^73770566405 is an apocalyptic number.

It is an amenable number.

73770566405 is a deficient number, since it is larger than the sum of its proper divisors (14754113287).

73770566405 is a wasteful number, since it uses less digits than its factorization.

73770566405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14754113286.

The product of its (nonzero) digits is 3704400, while the sum is 50.

The spelling of 73770566405 in words is "seventy-three billion, seven hundred seventy million, five hundred sixty-six thousand, four hundred five".