73866516849 has 6 divisors (see below), whose sum is σ = 106696079906. Its totient is φ = 49244344560.

The previous prime is 73866516833. The next prime is 73866516943. The reversal of 73866516849 is 94861566837.

73866516849 is a `hidden beast` number, since 7 + 38 + 6 + 6 + 516 + 84 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 60894445824 + 12972071025 = 246768^2 + 113895^2 .

It is not a de Polignac number, because 73866516849 - 2⁴ = 73866516833 is a prime.

It is a super-2 number, since 2×73866516849² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73866512849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4103695372 + ... + 4103695389.

Almost surely, 2^73866516849 is an apocalyptic number.

It is an amenable number.

73866516849 is a deficient number, since it is larger than the sum of its proper divisors (32829563057).

73866516849 is a wasteful number, since it uses less digits than its factorization.

73866516849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8207390767 (or 8207390764 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 73866516849 in words is "seventy-three billion, eight hundred sixty-six million, five hundred sixteen thousand, eight hundred forty-nine".