1661030564147 has 2 divisors, whose sum is σ = 1661030564148. Its totient is φ = 1661030564146.

The previous prime is 1661030564107. The next prime is 1661030564161. The reversal of 1661030564147 is 7414650301661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1661030564147 - 2¹⁸ = 1661030302003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1661030564098 and 1661030564107.

It is not a weakly prime, because it can be changed into another prime (1661030564107) 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, 830515282073 + 830515282074.

It is an arithmetic number, because the mean of its divisors is an integer number (830515282074).

Almost surely, 2^{1661030564147} is an apocalyptic number.

1661030564147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1661030564147 is an equidigital number, since it uses as much as digits as its factorization.

1661030564147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 1661030564147 in words is "one trillion, six hundred sixty-one billion, thirty million, five hundred sixty-four thousand, one hundred forty-seven".