61667283817 has 2 divisors, whose sum is σ = 61667283818. Its totient is φ = 61667283816.

The previous prime is 61667283793. The next prime is 61667283829. The reversal of 61667283817 is 71838276616.

61667283817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56043933696 + 5623350121 = 236736^2 + 74989^2 .

It is a cyclic number.

It is not a de Polignac number, because 61667283817 - 2¹⁵ = 61667251049 is a prime.

It is not a weakly prime, because it can be changed into another prime (61667283857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30833641908 + 30833641909.

It is an arithmetic number, because the mean of its divisors is an integer number (30833641909).

Almost surely, 2^61667283817 is an apocalyptic number.

It is an amenable number.

61667283817 is a deficient number, since it is larger than the sum of its proper divisors (1).

61667283817 is an equidigital number, since it uses as much as digits as its factorization.

61667283817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 55.

The spelling of 61667283817 in words is "sixty-one billion, six hundred sixty-seven million, two hundred eighty-three thousand, eight hundred seventeen".