18260661 has 8 divisors (see below), whose sum is σ = 24571360. Its totient is φ = 12061872.

The previous prime is 18260659. The next prime is 18260663. The reversal of 18260661 is 16606281.

It is an interprime number because it is at equal distance from previous prime (18260659) and next prime (18260663).

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

It is not a de Polignac number, because 18260661 - 2¹ = 18260659 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 (18260663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27595 + ... + 28248.

It is an arithmetic number, because the mean of its divisors is an integer number (3071420).

Almost surely, 2^18260661 is an apocalyptic number.

It is an amenable number.

18260661 is a deficient number, since it is larger than the sum of its proper divisors (6310699).

18260661 is a wasteful number, since it uses less digits than its factorization.

18260661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55955.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18260661 is about 4273.2494661557. The cubic root of 18260661 is about 263.3331280598. Note that the first 3 decimals are identical.

The spelling of 18260661 in words is "eighteen million, two hundred sixty thousand, six hundred sixty-one".