601161661663 has 2 divisors, whose sum is σ = 601161661664. Its totient is φ = 601161661662.

The previous prime is 601161661651. The next prime is 601161661687. The reversal of 601161661663 is 366166161106.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 601161661663 - 2³⁷ = 463722708191 is a prime.

It is a super-2 number, since 2×601161661663² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (601161661613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300580830831 + 300580830832.

It is an arithmetic number, because the mean of its divisors is an integer number (300580830832).

Almost surely, 2^601161661663 is an apocalyptic number.

601161661663 is a deficient number, since it is larger than the sum of its proper divisors (1).

601161661663 is an equidigital number, since it uses as much as digits as its factorization.

601161661663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 601161661663 in words is "six hundred one billion, one hundred sixty-one million, six hundred sixty-one thousand, six hundred sixty-three".