8661755 has 16 divisors (see below), whose sum is σ = 11085984. Its totient is φ = 6474240.

The previous prime is 8661743. The next prime is 8661767. The reversal of 8661755 is 5571668.

It is a happy number.

8661755 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8661743) and next prime (8661767).

It is a de Polignac number, because none of the positive numbers 2^k-8661755 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15104 + ... + 15666.

It is an arithmetic number, because the mean of its divisors is an integer number (692874).

Almost surely, 2^8661755 is an apocalyptic number.

8661755 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

8661755 is a deficient number, since it is larger than the sum of its proper divisors (2424229).

8661755 is a wasteful number, since it uses less digits than its factorization.

8661755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766.

The product of its digits is 50400, while the sum is 38.

The square root of 8661755 is about 2943.0859654451. The cubic root of 8661755 is about 205.3691939134.

The spelling of 8661755 in words is "eight million, six hundred sixty-one thousand, seven hundred fifty-five".