4668661626161 has 4 divisors (see below), whose sum is σ = 5027789443572. Its totient is φ = 4309533808752.

The previous prime is 4668661626157. The next prime is 4668661626197. The reversal of 4668661626161 is 1616261668664.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1529102891761 + 3139558734400 = 1236569^2 + 1771880^2 .

It is a cyclic number.

It is not a de Polignac number, because 4668661626161 - 2² = 4668661626157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4668661626161.

It is not an unprimeable number, because it can be changed into a prime (4668661626131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179563908686 + ... + 179563908711.

It is an arithmetic number, because the mean of its divisors is an integer number (1256947360893).

Almost surely, 2^{4668661626161} is an apocalyptic number.

It is an amenable number.

4668661626161 is a deficient number, since it is larger than the sum of its proper divisors (359127817411).

4668661626161 is a wasteful number, since it uses less digits than its factorization.

4668661626161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359127817410.

The product of its digits is 17915904, while the sum is 59.

The spelling of 4668661626161 in words is "four trillion, six hundred sixty-eight billion, six hundred sixty-one million, six hundred twenty-six thousand, one hundred sixty-one".