1660656164647 has 2 divisors, whose sum is σ = 1660656164648. Its totient is φ = 1660656164646.

The previous prime is 1660656164641. The next prime is 1660656164659. The reversal of 1660656164647 is 7464616560661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1660656164647 - 2¹⁵ = 1660656131879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660656164591 and 1660656164600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660656164641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830328082323 + 830328082324.

It is an arithmetic number, because the mean of its divisors is an integer number (830328082324).

Almost surely, 2^{1660656164647} is an apocalyptic number.

1660656164647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660656164647 is an equidigital number, since it uses as much as digits as its factorization.

1660656164647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 58.

The spelling of 1660656164647 in words is "one trillion, six hundred sixty billion, six hundred fifty-six million, one hundred sixty-four thousand, six hundred forty-seven".