618667841 has 8 divisors (see below), whose sum is σ = 675105024. Its totient is φ = 562263120.

The previous prime is 618667813. The next prime is 618667867. The reversal of 618667841 is 148766816.

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 618667841 - 2¹⁰ = 618666817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (618667811) 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, 49655 + ... + 60851.

It is an arithmetic number, because the mean of its divisors is an integer number (84388128).

Almost surely, 2^618667841 is an apocalyptic number.

It is an amenable number.

618667841 is a deficient number, since it is larger than the sum of its proper divisors (56437183).

618667841 is a wasteful number, since it uses less digits than its factorization.

618667841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16231.

The product of its digits is 387072, while the sum is 47.

The square root of 618667841 is about 24873.0344148035. The cubic root of 618667841 is about 852.0907429230.

The spelling of 618667841 in words is "six hundred eighteen million, six hundred sixty-seven thousand, eight hundred forty-one".