4661666661664 has 12 divisors (see below), whose sum is σ = 9177656240214. Its totient is φ = 2330833330816.

The previous prime is 4661666661653. The next prime is 4661666661667.

4661666661664 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 2511654432400 + 2150012229264 = 1584820^2 + 1466292^2 .

It is a super-2 number, since 2×4661666661664² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4661666661596 and 4661666661605.

It is not an unprimeable number, because it can be changed into a prime (4661666661667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72838541557 + ... + 72838541620.

Almost surely, 2^{4661666661664} is an apocalyptic number.

It is an amenable number.

4661666661664 is a deficient number, since it is larger than the sum of its proper divisors (4515989578550).

4661666661664 is a wasteful number, since it uses less digits than its factorization.

4661666661664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145677083187 (or 145677083179 counting only the distinct ones).

The product of its digits is 161243136, while the sum is 64.

The spelling of 4661666661664 in words is "four trillion, six hundred sixty-one billion, six hundred sixty-six million, six hundred sixty-one thousand, six hundred sixty-four".