10785661 has 4 divisors (see below), whose sum is σ = 10794112. Its totient is φ = 10777212.

The previous prime is 10785641. The next prime is 10785703. The reversal of 10785661 is 16658701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10785661 - 2⁵ = 10785629 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 (10785631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1875 + ... + 5008.

It is an arithmetic number, because the mean of its divisors is an integer number (2698528).

Almost surely, 2^10785661 is an apocalyptic number.

It is an amenable number.

10785661 is a deficient number, since it is larger than the sum of its proper divisors (8451).

10785661 is an equidigital number, since it uses as much as digits as its factorization.

10785661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8450.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 10785661 is about 3284.1530110517. The cubic root of 10785661 is about 220.9440219122.

The spelling of 10785661 in words is "ten million, seven hundred eighty-five thousand, six hundred sixty-one".