338618661 has 8 divisors (see below), whose sum is σ = 451582560. Its totient is φ = 225700272.

The previous prime is 338618647. The next prime is 338618663. The reversal of 338618661 is 166816833.

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

It is not a de Polignac number, because 338618661 - 2⁵ = 338618629 is a prime.

It is a super-2 number, since 2×338618661² = 229325195154865842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338618663) 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, 14206 + ... + 29648.

It is an arithmetic number, because the mean of its divisors is an integer number (56447820).

Almost surely, 2^338618661 is an apocalyptic number.

It is an amenable number.

338618661 is a deficient number, since it is larger than the sum of its proper divisors (112963899).

338618661 is a wasteful number, since it uses less digits than its factorization.

338618661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22755.

The product of its digits is 124416, while the sum is 42.

The square root of 338618661 is about 18401.5939798703. The cubic root of 338618661 is about 697.0067158806.

The spelling of 338618661 in words is "three hundred thirty-eight million, six hundred eighteen thousand, six hundred sixty-one".