10161661001 has 4 divisors (see below), whose sum is σ = 10161864852. Its totient is φ = 10161457152.

The previous prime is 10161660979. The next prime is 10161661067. The reversal of 10161661001 is 10016616101.

10161661001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10016616101 = 54709 ⋅183089.

It can be written as a sum of positive squares in 2 ways, for example, as 5458993225 + 4702667776 = 73885^2 + 68576^2 .

It is a cyclic number.

It is not a de Polignac number, because 10161661001 - 2¹⁸ = 10161398857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10161661091) 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 in 3 ways as a sum of consecutive naturals, for example, 28361 + ... + 145353.

It is an arithmetic number, because the mean of its divisors is an integer number (2540466213).

Almost surely, 2^10161661001 is an apocalyptic number.

It is an amenable number.

10161661001 is a deficient number, since it is larger than the sum of its proper divisors (203851).

10161661001 is an equidigital number, since it uses as much as digits as its factorization.

10161661001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203850.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 10161661001 in words is "ten billion, one hundred sixty-one million, six hundred sixty-one thousand, one".