8701661 has 4 divisors (see below), whose sum is σ = 8713692. Its totient is φ = 8689632.

The previous prime is 8701657. The next prime is 8701703. The reversal of 8701661 is 1661078.

8701661 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3728761 + 4972900 = 1931^2 + 2230^2 .

It is a cyclic number.

It is not a de Polignac number, because 8701661 - 2² = 8701657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8701621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4856 + ... + 6401.

It is an arithmetic number, because the mean of its divisors is an integer number (2178423).

Almost surely, 2^8701661 is an apocalyptic number.

It is an amenable number.

8701661 is a deficient number, since it is larger than the sum of its proper divisors (12031).

8701661 is a wasteful number, since it uses less digits than its factorization.

8701661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12030.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 8701661 is about 2949.8577931826. The cubic root of 8701661 is about 205.6840996594.

The spelling of 8701661 in words is "eight million, seven hundred one thousand, six hundred sixty-one".