7711661 has 2 divisors, whose sum is σ = 7711662. Its totient is φ = 7711660.

The previous prime is 7711643. The next prime is 7711667. The reversal of 7711661 is 1661177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5262436 + 2449225 = 2294^2 + 1565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7711661 is a prime.

It is a super-4 number, since 4×7711661⁴ (a number of 29 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7711667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3855830 + 3855831.

It is an arithmetic number, because the mean of its divisors is an integer number (3855831).

Almost surely, 2^7711661 is an apocalyptic number.

It is an amenable number.

7711661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7711661 is an equidigital number, since it uses as much as digits as its factorization.

7711661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 29.

The square root of 7711661 is about 2776.9877565449. The cubic root of 7711661 is about 197.5677148568.

It can be divided in two parts, 77116 and 61, that added together give a palindrome (77177).

The spelling of 7711661 in words is "seven million, seven hundred eleven thousand, six hundred sixty-one".