816667058461 has 4 divisors (see below), whose sum is σ = 864706297212. Its totient is φ = 768627819712.

The previous prime is 816667058443. The next prime is 816667058503. The reversal of 816667058461 is 164850766618.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164850766618 = 2 ⋅82425383309.

It can be written as a sum of positive squares in 2 ways, for example, as 767759735961 + 48907322500 = 876219^2 + 221150^2 .

It is a cyclic number.

It is not a de Polignac number, because 816667058461 - 2²¹ = 816664961309 is a prime.

It is a Smith number, since the sum of its digits (58) 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 a junction number, because it is equal to n+sod(n) for n = 816667058396 and 816667058405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816667058261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24019619350 + ... + 24019619383.

It is an arithmetic number, because the mean of its divisors is an integer number (216176574303).

Almost surely, 2^816667058461 is an apocalyptic number.

It is an amenable number.

816667058461 is a deficient number, since it is larger than the sum of its proper divisors (48039238751).

816667058461 is a wasteful number, since it uses less digits than its factorization.

816667058461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48039238750.

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 816667058461 in words is "eight hundred sixteen billion, six hundred sixty-seven million, fifty-eight thousand, four hundred sixty-one".