1965615660667 has 2 divisors, whose sum is σ = 1965615660668. Its totient is φ = 1965615660666.

The previous prime is 1965615660577. The next prime is 1965615660683. The reversal of 1965615660667 is 7660665165691.

It is a strong prime.

It is an emirp because it is prime and its reverse (7660665165691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1965615660667 - 2²³ = 1965607272059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1965615660599 and 1965615660608.

It is not a weakly prime, because it can be changed into another prime (1965615600667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982807830333 + 982807830334.

It is an arithmetic number, because the mean of its divisors is an integer number (982807830334).

Almost surely, 2^{1965615660667} is an apocalyptic number.

1965615660667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1965615660667 is an equidigital number, since it uses as much as digits as its factorization.

1965615660667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73483200, while the sum is 64.

The spelling of 1965615660667 in words is "one trillion, nine hundred sixty-five billion, six hundred fifteen million, six hundred sixty thousand, six hundred sixty-seven".