10661618 has 32 divisors (see below), whose sum is σ = 19128960. Its totient is φ = 4399360.

The previous prime is 10661611. The next prime is 10661653. The reversal of 10661618 is 81616601.

It is a super-2 number, since 2×10661618² = 227340196755848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (10661611) 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 15 ways as a sum of consecutive naturals, for example, 10355 + ... + 11337.

It is an arithmetic number, because the mean of its divisors is an integer number (597780).

Almost surely, 2^10661618 is an apocalyptic number.

10661618 is a deficient number, since it is larger than the sum of its proper divisors (8467342).

10661618 is a wasteful number, since it uses less digits than its factorization.

10661618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 10661618 is about 3265.2133161556. The cubic root of 10661618 is about 220.0937479246.

The spelling of 10661618 in words is "ten million, six hundred sixty-one thousand, six hundred eighteen".