8712661 has 2 divisors, whose sum is σ = 8712662. Its totient is φ = 8712660.

The previous prime is 8712629. The next prime is 8712677. The reversal of 8712661 is 1662178.

8712661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7700625 + 1012036 = 2775^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 8712661 - 2⁵ = 8712629 is a prime.

It is a Chen prime.

8712661 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8712601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4356330 + 4356331.

It is an arithmetic number, because the mean of its divisors is an integer number (4356331).

Almost surely, 2^8712661 is an apocalyptic number.

It is an amenable number.

8712661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8712661 is an equidigital number, since it uses as much as digits as its factorization.

8712661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 8712661 is about 2951.7217009739. The cubic root of 8712661 is about 205.7707334025.

The spelling of 8712661 in words is "eight million, seven hundred twelve thousand, six hundred sixty-one".