3666730261 has 2 divisors, whose sum is σ = 3666730262. Its totient is φ = 3666730260.

The previous prime is 3666730247. The next prime is 3666730283. The reversal of 3666730261 is 1620376663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2497500625 + 1169229636 = 49975^2 + 34194^2 .

It is a cyclic number.

It is not a de Polignac number, because 3666730261 - 2¹¹ = 3666728213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3666730201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1833365130 + 1833365131.

It is an arithmetic number, because the mean of its divisors is an integer number (1833365131).

Almost surely, 2^3666730261 is an apocalyptic number.

It is an amenable number.

3666730261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3666730261 is an equidigital number, since it uses as much as digits as its factorization.

3666730261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 40.

The square root of 3666730261 is about 60553.5321925980. The cubic root of 3666730261 is about 1542.0305845706.

The spelling of 3666730261 in words is "three billion, six hundred sixty-six million, seven hundred thirty thousand, two hundred sixty-one".