10661655 has 8 divisors (see below), whose sum is σ = 17058672. Its totient is φ = 5686208.

The previous prime is 10661653. The next prime is 10661671. The reversal of 10661655 is 55616601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10661655 - 2¹ = 10661653 is a prime.

It is a super-2 number, since 2×10661655² = 227341774678050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661653) 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 7 ways as a sum of consecutive naturals, for example, 355374 + ... + 355403.

It is an arithmetic number, because the mean of its divisors is an integer number (2132334).

Almost surely, 2^10661655 is an apocalyptic number.

10661655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10661655 is a deficient number, since it is larger than the sum of its proper divisors (6397017).

10661655 is an equidigital number, since it uses as much as digits as its factorization.

10661655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710785.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 10661655 is about 3265.2189819367. The cubic root of 10661655 is about 220.0940025282.

The spelling of 10661655 in words is "ten million, six hundred sixty-one thousand, six hundred fifty-five".