73666677722017 has 4 divisors (see below), whose sum is σ = 73666830737556. Its totient is φ = 73666524706480.

The previous prime is 73666677721991. The next prime is 73666677722021. The reversal of 73666677722017 is 71022777666637.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63138216753936 + 10528460968081 = 7945956^2 + 3244759^2 .

It is a cyclic number.

It is not a de Polignac number, because 73666677722017 - 2²⁷ = 73666543504289 is a prime.

It is a super-3 number, since 3×73666677722017³ (a number of 43 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73666677722717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75783334 + ... + 76749247.

It is an arithmetic number, because the mean of its divisors is an integer number (18416707684389).

Almost surely, 2^{73666677722017} is an apocalyptic number.

It is an amenable number.

73666677722017 is a deficient number, since it is larger than the sum of its proper divisors (153015539).

73666677722017 is a wasteful number, since it uses less digits than its factorization.

73666677722017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153015538.

The product of its (nonzero) digits is 261382464, while the sum is 67.

The spelling of 73666677722017 in words is "seventy-three trillion, six hundred sixty-six billion, six hundred seventy-seven million, seven hundred twenty-two thousand, seventeen".