161224666787 has 2 divisors, whose sum is σ = 161224666788. Its totient is φ = 161224666786.

The previous prime is 161224666777. The next prime is 161224666831. The reversal of 161224666787 is 787666422161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161224666787 - 2¹⁴ = 161224650403 is a prime.

It is not a weakly prime, because it can be changed into another prime (161224666777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80612333393 + 80612333394.

It is an arithmetic number, because the mean of its divisors is an integer number (80612333394).

Almost surely, 2^161224666787 is an apocalyptic number.

161224666787 is a deficient number, since it is larger than the sum of its proper divisors (1).

161224666787 is an equidigital number, since it uses as much as digits as its factorization.

161224666787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 56.

The spelling of 161224666787 in words is "one hundred sixty-one billion, two hundred twenty-four million, six hundred sixty-six thousand, seven hundred eighty-seven".