10618661 has 4 divisors (see below), whose sum is σ = 10632300. Its totient is φ = 10605024.

The previous prime is 10618651. The next prime is 10618681. The reversal of 10618661 is 16681601.

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 4708900 + 5909761 = 2170^2 + 2431^2 .

It is a cyclic number.

It is not a de Polignac number, because 10618661 - 2²² = 6424357 is a prime.

It is a super-2 number, since 2×10618661² = 225511922865842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10618651) 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, 5576 + ... + 7233.

It is an arithmetic number, because the mean of its divisors is an integer number (2658075).

Almost surely, 2^10618661 is an apocalyptic number.

It is an amenable number.

10618661 is a deficient number, since it is larger than the sum of its proper divisors (13639).

10618661 is an equidigital number, since it uses as much as digits as its factorization.

10618661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13638.

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

The square root of 10618661 is about 3258.6286993151. The cubic root of 10618661 is about 219.7977549052.

The spelling of 10618661 in words is "ten million, six hundred eighteen thousand, six hundred sixty-one".