2660466661 has 2 divisors, whose sum is σ = 2660466662. Its totient is φ = 2660466660.

The previous prime is 2660466643. The next prime is 2660466701. The reversal of 2660466661 is 1666640662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2029502500 + 630964161 = 45050^2 + 25119^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660466661 - 2²⁵ = 2626912229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2660466461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330233330 + 1330233331.

It is an arithmetic number, because the mean of its divisors is an integer number (1330233331).

Almost surely, 2^2660466661 is an apocalyptic number.

It is an amenable number.

2660466661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660466661 is an equidigital number, since it uses as much as digits as its factorization.

2660466661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 43.

The square root of 2660466661 is about 51579.7117188532. The cubic root of 2660466661 is about 1385.6470037645.

The spelling of 2660466661 in words is "two billion, six hundred sixty million, four hundred sixty-six thousand, six hundred sixty-one".