61667283857 has 2 divisors, whose sum is σ = 61667283858. Its totient is φ = 61667283856.

The previous prime is 61667283841. The next prime is 61667283893. The reversal of 61667283857 is 75838276616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59115114496 + 2552169361 = 243136^2 + 50519^2 .

It is a cyclic number.

It is not a de Polignac number, because 61667283857 - 2⁴ = 61667283841 is a prime.

It is a super-3 number, since 3×61667283857³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61667283796 and 61667283805.

It is not a weakly prime, because it can be changed into another prime (61667283817) 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 as a sum of consecutive naturals, namely, 30833641928 + 30833641929.

It is an arithmetic number, because the mean of its divisors is an integer number (30833641929).

Almost surely, 2^61667283857 is an apocalyptic number.

It is an amenable number.

61667283857 is a deficient number, since it is larger than the sum of its proper divisors (1).

61667283857 is an equidigital number, since it uses as much as digits as its factorization.

61667283857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20321280, while the sum is 59.

The spelling of 61667283857 in words is "sixty-one billion, six hundred sixty-seven million, two hundred eighty-three thousand, eight hundred fifty-seven".