7666261 has 2 divisors, whose sum is σ = 7666262. Its totient is φ = 7666260.

The previous prime is 7666249. The next prime is 7666273. The reversal of 7666261 is 1626667.

It is a balanced prime because it is at equal distance from previous prime (7666249) and next prime (7666273).

It can be written as a sum of positive squares in only one way, i.e., 4536900 + 3129361 = 2130^2 + 1769^2 .

It is a cyclic number.

It is not a de Polignac number, because 7666261 - 2¹⁹ = 7141973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7666661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3833130 + 3833131.

It is an arithmetic number, because the mean of its divisors is an integer number (3833131).

Almost surely, 2^7666261 is an apocalyptic number.

It is an amenable number.

7666261 is a deficient number, since it is larger than the sum of its proper divisors (1).

7666261 is an equidigital number, since it uses as much as digits as its factorization.

7666261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 7666261 is about 2768.8013652120. The cubic root of 7666261 is about 197.1792454160.

The spelling of 7666261 in words is "seven million, six hundred sixty-six thousand, two hundred sixty-one".