100660161281 has 2 divisors, whose sum is σ = 100660161282. Its totient is φ = 100660161280.

The previous prime is 100660161233. The next prime is 100660161307. The reversal of 100660161281 is 182161066001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56577379600 + 44082781681 = 237860^2 + 209959^2 .

It is a cyclic number.

It is not a de Polignac number, because 100660161281 - 2¹⁰ = 100660160257 is a prime.

It is a super-2 number, since 2×100660161281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100660161221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50330080640 + 50330080641.

It is an arithmetic number, because the mean of its divisors is an integer number (50330080641).

Almost surely, 2^100660161281 is an apocalyptic number.

It is an amenable number.

100660161281 is a deficient number, since it is larger than the sum of its proper divisors (1).

100660161281 is an equidigital number, since it uses as much as digits as its factorization.

100660161281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 100660161281 in words is "one hundred billion, six hundred sixty million, one hundred sixty-one thousand, two hundred eighty-one".